400497552 has 180 divisors, whose sum is σ = 1387661184. Its totient is φ = 105580800.

The previous prime is 400497533. The next prime is 400497557. The reversal of 400497552 is 255794004.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (400497557) 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 35 ways as a sum of consecutive naturals, for example, 169177 + ... + 171527.

Almost surely, 2^400497552 is an apocalyptic number.

400497552 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 400497552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693830592).

400497552 is an abundant number, since it is smaller than the sum of its proper divisors (987163632).

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

400497552 is a wasteful number, since it uses less digits than its factorization.

400497552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398 (or 2376 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 400497552 is about 20012.4349343102. The cubic root of 400497552 is about 737.1116726873. Note that the first 3 decimals are identical.

The spelling of 400497552 in words is "four hundred million, four hundred ninety-seven thousand, five hundred fifty-two".