402056100 has 108 divisors (see below), whose sum is σ = 1315082496. Its totient is φ = 102548160.

The previous prime is 402056099. The next prime is 402056107. The reversal of 402056100 is 1650204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (402056107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10989 + ... + 30411.

Almost surely, 2^402056100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402056100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657541248).

402056100 is an abundant number, since it is smaller than the sum of its proper divisors (913026396).

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

402056100 is a wasteful number, since it uses less digits than its factorization.

402056100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19466 (or 19456 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 402056100 is about 20051.3366138021. The cubic root of 402056100 is about 738.0665989648.

The spelling of 402056100 in words is "four hundred two million, fifty-six thousand, one hundred".