390203136 has 72 divisors (see below), whose sum is σ = 1153919760. Its totient is φ = 130065408.

The previous prime is 390203131. The next prime is 390203141. The reversal of 390203136 is 631302093.

It is an interprime number because it is at equal distance from previous prime (390203131) and next prime (390203141).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390203131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21315 + ... + 35138.

Almost surely, 2^390203136 is an apocalyptic number.

390203136 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

390203136 is an abundant number, since it is smaller than the sum of its proper divisors (763716624).

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

390203136 is an equidigital number, since it uses as much as digits as its factorization.

390203136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56478 (or 56458 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 390203136 is about 19753.5600841975. The cubic root of 390203136 is about 730.7411850284.

The spelling of 390203136 in words is "three hundred ninety million, two hundred three thousand, one hundred thirty-six".