395378840 has 32 divisors (see below), whose sum is σ = 890239680. Its totient is φ = 158038272.

The previous prime is 395378821. The next prime is 395378857. The reversal of 395378840 is 48873593.

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, 73937 + ... + 79103.

It is an arithmetic number, because the mean of its divisors is an integer number (27819990).

Almost surely, 2^395378840 is an apocalyptic number.

It is an amenable number.

395378840 is an abundant number, since it is smaller than the sum of its proper divisors (494860840).

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

395378840 is a wasteful number, since it uses less digits than its factorization.

395378840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7091 (or 7087 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 395378840 is about 19884.1353847735. The cubic root of 395378840 is about 733.9578857557.

The spelling of 395378840 in words is "three hundred ninety-five million, three hundred seventy-eight thousand, eight hundred forty".