400025415040 has 64 divisors (see below), whose sum is σ = 979635474720. Its totient is φ = 156107468800.

The previous prime is 400025415037. The next prime is 400025415059. The reversal of 400025415040 is 40514520004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 400025414996 and 400025415014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7596196 + ... + 7648675.

Almost surely, 2^400025415040 is an apocalyptic number.

400025415040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400025415040 is an abundant number, since it is smaller than the sum of its proper divisors (579610059680).

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

400025415040 is a wasteful number, since it uses less digits than its factorization.

400025415040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15244931 (or 15244919 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 400025415040 its reverse (40514520004), we get a palindrome (440539935044).

The spelling of 400025415040 in words is "four hundred billion, twenty-five million, four hundred fifteen thousand, forty".