400552152 has 128 divisors (see below), whose sum is σ = 1344591360. Its totient is φ = 96030720.

The previous prime is 400552151. The next prime is 400552171. The reversal of 400552152 is 251255004.

It is a happy number.

It is a super-2 number, since 2×400552152² = 320884052943662208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400552151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15688 + ... + 32360.

It is an arithmetic number, because the mean of its divisors is an integer number (10504620).

Almost surely, 2^400552152 is an apocalyptic number.

400552152 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400552152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672295680).

400552152 is an abundant number, since it is smaller than the sum of its proper divisors (944039208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400552152 is a wasteful number, since it uses less digits than its factorization.

400552152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16713 (or 16709 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 400552152 is about 20013.7990396626. The cubic root of 400552152 is about 737.1451680802.

The spelling of 400552152 in words is "four hundred million, five hundred fifty-two thousand, one hundred fifty-two".