40402402400 has 36 divisors (see below), whose sum is σ = 98632366812. Its totient is φ = 16160960640.

The previous prime is 40402402373. The next prime is 40402402457. The reversal of 40402402400 is 420420404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25250702 + ... + 25252301.

It is an arithmetic number, because the mean of its divisors is an integer number (2739787967).

Almost surely, 2^40402402400 is an apocalyptic number.

40402402400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40402402400 is an abundant number, since it is smaller than the sum of its proper divisors (58229964412).

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

40402402400 is a wasteful number, since it uses less digits than its factorization.

40402402400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50503023 (or 50503010 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40402402400 its reverse (420420404), we get a palindrome (40822822804).

The spelling of 40402402400 in words is "forty billion, four hundred two million, four hundred two thousand, four hundred".