395128504 has 8 divisors (see below), whose sum is σ = 740865960. Its totient is φ = 197564248.

The previous prime is 395128499. The next prime is 395128507. The reversal of 395128504 is 405821593.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×395128504² = 312253069346556032, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395128507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24695524 + ... + 24695539.

It is an arithmetic number, because the mean of its divisors is an integer number (92608245).

Almost surely, 2^395128504 is an apocalyptic number.

It is an amenable number.

395128504 is a deficient number, since it is larger than the sum of its proper divisors (345737456).

395128504 is a wasteful number, since it uses less digits than its factorization.

395128504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49391069 (or 49391065 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 395128504 is about 19877.8395204308. The cubic root of 395128504 is about 733.8029500720.

The spelling of 395128504 in words is "three hundred ninety-five million, one hundred twenty-eight thousand, five hundred four".