390736 has 10 divisors (see below), whose sum is σ = 757082. Its totient is φ = 195360.

The previous prime is 390727. The next prime is 390737. The reversal of 390736 is 637093.

390736 = T₁₄₀ + T₁₄₁ + ... + T₁₇₁.

It can be written as a sum of positive squares in only one way, i.e., 197136 + 193600 = 444^2 + 440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390737) by changing a digit.

390736 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12195 + ... + 12226.

2³⁹⁰⁷³⁶ is an apocalyptic number.

It is an amenable number.

390736 is a deficient number, since it is larger than the sum of its proper divisors (366346).

390736 is a wasteful number, since it uses less digits than its factorization.

390736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24429 (or 24423 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 390736 is about 625.0887936925. The cubic root of 390736 is about 73.1073668736.

The spelling of 390736 in words is "three hundred ninety thousand, seven hundred thirty-six".