396139464 has 256 divisors, whose sum is σ = 1322764800. Its totient is φ = 107495424.

The previous prime is 396139451. The next prime is 396139487. The reversal of 396139464 is 464931693.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4083864 + ... + 4083960.

It is an arithmetic number, because the mean of its divisors is an integer number (5167050).

Almost surely, 2^396139464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 396139464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (661382400).

396139464 is an abundant number, since it is smaller than the sum of its proper divisors (926625336).

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

396139464 is a wasteful number, since it uses less digits than its factorization.

396139464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 219 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 396139464 is about 19903.2525985076. The cubic root of 396139464 is about 734.4282433924.

The spelling of 396139464 in words is "three hundred ninety-six million, one hundred thirty-nine thousand, four hundred sixty-four".