400003472 has 40 divisors (see below), whose sum is σ = 895201632. Its totient is φ = 171123200.

The previous prime is 400003453. The next prime is 400003493. The reversal of 400003472 is 274300004.

It is a happy number.

It is a super-2 number, since 2×400003472² = 320005555224109568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63854 + ... + 69837.

Almost surely, 2^400003472 is an apocalyptic number.

It is an amenable number.

400003472 is an abundant number, since it is smaller than the sum of its proper divisors (495198160).

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

400003472 is a wasteful number, since it uses less digits than its factorization.

400003472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133727 (or 133721 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 400003472 is about 20000.0867998116. The cubic root of 400003472 is about 736.8084315481.

Adding to 400003472 its reverse (274300004), we get a palindrome (674303476).

The spelling of 400003472 in words is "four hundred million, three thousand, four hundred seventy-two".