390052836 has 18 divisors (see below), whose sum is σ = 985966982. Its totient is φ = 130017600.

The previous prime is 390052823. The next prime is 390052847. The reversal of 390052836 is 638250093.

It can be written as a sum of positive squares in only one way, i.e., 350438400 + 39614436 = 18720^2 + 6294^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 10834801 = 390052836 / (3 + 9 + 0 + 0 + 5 + 2 + 8 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 390052836.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5417365 + ... + 5417436.

Almost surely, 2^390052836 is an apocalyptic number.

390052836 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

390052836 is an abundant number, since it is smaller than the sum of its proper divisors (595914146).

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

390052836 is a wasteful number, since it uses less digits than its factorization.

390052836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10834811 (or 10834806 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 390052836 is about 19749.7553402567. The cubic root of 390052836 is about 730.6473497115.

The spelling of 390052836 in words is "three hundred ninety million, fifty-two thousand, eight hundred thirty-six".