394820465 has 32 divisors (see below), whose sum is σ = 520732800. Its totient is φ = 285626880.

The previous prime is 394820449. The next prime is 394820467. The reversal of 394820465 is 564028493.

394820465 = 170² + 171² + ... + 1059².

It is not a de Polignac number, because 394820465 - 2⁴ = 394820449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394820467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 803870 + ... + 804360.

It is an arithmetic number, because the mean of its divisors is an integer number (16272900).

Almost surely, 2^394820465 is an apocalyptic number.

It is an amenable number.

394820465 is a deficient number, since it is larger than the sum of its proper divisors (125912335).

394820465 is a wasteful number, since it uses less digits than its factorization.

394820465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 394820465 is about 19870.0897079002. The cubic root of 394820465 is about 733.6122115403.

The spelling of 394820465 in words is "three hundred ninety-four million, eight hundred twenty thousand, four hundred sixty-five".