764613990 has 48 divisors (see below), whose sum is σ = 2271997728. Its totient is φ = 174768768.

The previous prime is 764613973. The next prime is 764614007. The reversal of 764613990 is 99316467.

764613990 is a `hidden beast` number, since 76 + 461 + 39 + 90 = 666.

764613990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (764613973) and next prime (764614007).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 606207 + ... + 607466.

It is an arithmetic number, because the mean of its divisors is an integer number (47333286).

Almost surely, 2^764613990 is an apocalyptic number.

764613990 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

764613990 is an abundant number, since it is smaller than the sum of its proper divisors (1507383738).

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

764613990 is a wasteful number, since it uses less digits than its factorization.

764613990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213693 (or 1213690 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 764613990 is about 27651.6543808865. The cubic root of 764613990 is about 914.4235731598.

The spelling of 764613990 in words is "seven hundred sixty-four million, six hundred thirteen thousand, nine hundred ninety".