400445250 has 32 divisors (see below), whose sum is σ = 999513216. Its totient is φ = 106785200.

The previous prime is 400445207. The next prime is 400445257. The reversal of 400445250 is 52544004.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 400445250.

It is not an unprimeable number, because it can be changed into a prime (400445257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266214 + ... + 267713.

It is an arithmetic number, because the mean of its divisors is an integer number (31234788).

Almost surely, 2^400445250 is an apocalyptic number.

400445250 is an abundant number, since it is smaller than the sum of its proper divisors (599067966).

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

400445250 is a wasteful number, since it uses less digits than its factorization.

400445250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533947 (or 533937 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 400445250 is about 20011.1281541047. The cubic root of 400445250 is about 737.0795841907.

Adding to 400445250 its reverse (52544004), we get a palindrome (452989254).

The spelling of 400445250 in words is "four hundred million, four hundred forty-five thousand, two hundred fifty".