380771640 has 48 divisors (see below), whose sum is σ = 1237509000. Its totient is φ = 101539008.

The previous prime is 380771639. The next prime is 380771669. The reversal of 380771640 is 46177083.

380771640 is a `hidden beast` number, since 3 + 8 + 0 + 7 + 7 + 1 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 380771595 and 380771604.

It is a congruent number.

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, 528490 + ... + 529209.

Almost surely, 2^380771640 is an apocalyptic number.

380771640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

380771640 is an abundant number, since it is smaller than the sum of its proper divisors (856737360).

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

380771640 is a wasteful number, since it uses less digits than its factorization.

380771640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057716 (or 1057709 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 380771640 is about 19513.3708005562. The cubic root of 380771640 is about 724.8055856038.

The spelling of 380771640 in words is "three hundred eighty million, seven hundred seventy-one thousand, six hundred forty".