381907744 has 12 divisors (see below), whose sum is σ = 751880934. Its totient is φ = 190953856.

The previous prime is 381907741. The next prime is 381907781. The reversal of 381907744 is 447709183.

It can be written as a sum of positive squares in only one way, i.e., 288592144 + 93315600 = 16988^2 + 9660^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 381907744.

It is not an unprimeable number, because it can be changed into a prime (381907741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5967277 + ... + 5967340.

Almost surely, 2^381907744 is an apocalyptic number.

It is an amenable number.

381907744 is a deficient number, since it is larger than the sum of its proper divisors (369973190).

381907744 is a wasteful number, since it uses less digits than its factorization.

381907744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11934627 (or 11934619 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 381907744 is about 19542.4600293822. The cubic root of 381907744 is about 725.5257345646.

It can be divided in two parts, 38190 and 7744, that multiplied together give a triangular number (295743360 = T₂₄₃₂₀).

The spelling of 381907744 in words is "three hundred eighty-one million, nine hundred seven thousand, seven hundred forty-four".