400532444 has 96 divisors (see below), whose sum is σ = 841046976. Its totient is φ = 165150720.

The previous prime is 400532443. The next prime is 400532453. The reversal of 400532444 is 444235004.

It is a super-2 number, since 2×400532444² = 320852477393226272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400532441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1558364 + ... + 1558620.

It is an arithmetic number, because the mean of its divisors is an integer number (8760906).

Almost surely, 2^400532444 is an apocalyptic number.

It is an amenable number.

400532444 is an abundant number, since it is smaller than the sum of its proper divisors (440514532).

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

400532444 is a wasteful number, since it uses less digits than its factorization.

400532444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 400532444 is about 20013.3066733111. The cubic root of 400532444 is about 737.1330781895.

Adding to 400532444 its reverse (444235004), we get a palindrome (844767448).

The spelling of 400532444 in words is "four hundred million, five hundred thirty-two thousand, four hundred forty-four".