394729536 has 56 divisors (see below), whose sum is σ = 1061541184. Its totient is φ = 129415680.

The previous prime is 394729523. The next prime is 394729549. The reversal of 394729536 is 635927493.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (394729523) and next prime (394729549).

It is a super-2 number, since 2×394729536² = 311622813181550592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5140 + ... + 28563.

Almost surely, 2^394729536 is an apocalyptic number.

It is an amenable number.

394729536 is an abundant number, since it is smaller than the sum of its proper divisors (666811648).

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

394729536 is a wasteful number, since it uses less digits than its factorization.

394729536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33779 (or 33769 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 48.

The square root of 394729536 is about 19867.8014888412. The cubic root of 394729536 is about 733.5558891083. Note that the first 3 decimals are identical.

The spelling of 394729536 in words is "three hundred ninety-four million, seven hundred twenty-nine thousand, five hundred thirty-six".