380996640 has 72 divisors (see below), whose sum is σ = 1300155948. Its totient is φ = 101598720.

The previous prime is 380996611. The next prime is 380996657. The reversal of 380996640 is 46699083.

It can be written as a sum of positive squares in 2 ways, for example, as 377447184 + 3549456 = 19428^2 + 1884^2 .

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

It is a super-3 number, since 3×380996640³ (a number of 27 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130851 + ... + 133730.

Almost surely, 2^380996640 is an apocalyptic number.

380996640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

380996640 is an abundant number, since it is smaller than the sum of its proper divisors (919159308).

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

380996640 is a wasteful number, since it uses less digits than its factorization.

380996640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264602 (or 264591 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 380996640 is about 19519.1352267461. The cubic root of 380996640 is about 724.9483213263.

The spelling of 380996640 in words is "three hundred eighty million, nine hundred ninety-six thousand, six hundred forty".