402102040 has 16 divisors (see below), whose sum is σ = 904729680. Its totient is φ = 160840800.

The previous prime is 402101989. The next prime is 402102053. The reversal of 402102040 is 40201204.

It is a self number, because there is not a number n which added to its sum of digits gives 402102040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5026236 + ... + 5026315.

It is an arithmetic number, because the mean of its divisors is an integer number (56545605).

Almost surely, 2^402102040 is an apocalyptic number.

402102040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402102040 is an abundant number, since it is smaller than the sum of its proper divisors (502627640).

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

402102040 is a wasteful number, since it uses less digits than its factorization.

402102040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10052562 (or 10052558 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 402102040 is about 20052.4821406229. The cubic root of 402102040 is about 738.0947090454.

Adding to 402102040 its reverse (40201204), we get a palindrome (442303244).

The spelling of 402102040 in words is "four hundred two million, one hundred two thousand, forty".