400082500 has 30 divisors (see below), whose sum is σ = 874905878. Its totient is φ = 160032000.

The previous prime is 400082479. The next prime is 400082509. The reversal of 400082500 is 5280004.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 289748484 + 110334016 = 17022^2 + 10504^2 .

It is not an unprimeable number, because it can be changed into a prime (400082509) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 77517 + ... + 82516.

Almost surely, 2^400082500 is an apocalyptic number.

It is an amenable number.

400082500 is an abundant number, since it is smaller than the sum of its proper divisors (474823378).

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

400082500 is a wasteful number, since it uses less digits than its factorization.

400082500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160057 (or 160040 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 400082500 is about 20002.0623936633. The cubic root of 400082500 is about 736.8569516790.

The spelling of 400082500 in words is "four hundred million, eighty-two thousand, five hundred".