400302240 has 96 divisors (see below), whose sum is σ = 1357969536. Its totient is φ = 98534400.

The previous prime is 400302239. The next prime is 400302251. The reversal of 400302240 is 42203004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25836 + ... + 38315.

It is an arithmetic number, because the mean of its divisors is an integer number (14145516).

Almost surely, 2^400302240 is an apocalyptic number.

400302240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400302240 is an abundant number, since it is smaller than the sum of its proper divisors (957667296).

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

400302240 is a wasteful number, since it uses less digits than its factorization.

400302240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64182 (or 64174 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 400302240 is about 20007.5545732106. The cubic root of 400302240 is about 736.9918299537.

Adding to 400302240 its reverse (42203004), we get a palindrome (442505244).

The spelling of 400302240 in words is "four hundred million, three hundred two thousand, two hundred forty".