402040100 has 108 divisors (see below), whose sum is σ = 1107272880. Its totient is φ = 125294400.

The previous prime is 402040091. The next prime is 402040103. The reversal of 402040100 is 1040204.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is not an unprimeable number, because it can be changed into a prime (402040103) 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, 50171 + ... + 57629.

Almost surely, 2^402040100 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 402040100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553636440).

402040100 is an abundant number, since it is smaller than the sum of its proper divisors (705232780).

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

402040100 is a wasteful number, since it uses less digits than its factorization.

402040100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7498 (or 7484 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 402040100 is about 20050.9376339362. The cubic root of 402040100 is about 738.0568082728.

Adding to 402040100 its reverse (1040204), we get a palindrome (403080304).

The spelling of 402040100 in words is "four hundred two million, forty thousand, one hundred".