396040040 has 32 divisors (see below), whose sum is σ = 972099360. Its totient is φ = 144014400.

The previous prime is 396040003. The next prime is 396040067. The reversal of 396040040 is 40040693.

It is a junction number, because it is equal to n+sod(n) for n = 396039991 and 396040009.

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, 449606 + ... + 450485.

It is an arithmetic number, because the mean of its divisors is an integer number (30378105).

Almost surely, 2^396040040 is an apocalyptic number.

It is an amenable number.

396040040 is an abundant number, since it is smaller than the sum of its proper divisors (576059320).

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

396040040 is a wasteful number, since it uses less digits than its factorization.

396040040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900113 (or 900109 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 396040040 is about 19900.7547595562. The cubic root of 396040040 is about 734.3667954176.

The spelling of 396040040 in words is "three hundred ninety-six million, forty thousand, forty".