400402422040 has 32 divisors (see below), whose sum is σ = 917903670480. Its totient is φ = 157139062912.

The previous prime is 400402421989. The next prime is 400402422047. The reversal of 400402422040 is 40224204004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400402422047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94432414 + ... + 94436653.

Almost surely, 2^400402422040 is an apocalyptic number.

400402422040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400402422040 is an abundant number, since it is smaller than the sum of its proper divisors (517501248440).

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

400402422040 is a wasteful number, since it uses less digits than its factorization.

400402422040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188869131 (or 188869127 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 400402422040 its reverse (40224204004), we get a palindrome (440626626044).

The spelling of 400402422040 in words is "four hundred billion, four hundred two million, four hundred twenty-two thousand, forty".