381264536 has 16 divisors (see below), whose sum is σ = 737931840. Its totient is φ = 184482720.

The previous prime is 381264529. The next prime is 381264547. The reversal of 381264536 is 635462183.

It is a super-2 number, since 2×381264536² = 290725292822590592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381264536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768431 + ... + 768926.

It is an arithmetic number, because the mean of its divisors is an integer number (46120740).

Almost surely, 2^381264536 is an apocalyptic number.

It is an amenable number.

381264536 is a deficient number, since it is larger than the sum of its proper divisors (356667304).

381264536 is a wasteful number, since it uses less digits than its factorization.

381264536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537394 (or 1537390 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 381264536 is about 19525.9964150360. The cubic root of 381264536 is about 725.1181961873.

The spelling of 381264536 in words is "three hundred eighty-one million, two hundred sixty-four thousand, five hundred thirty-six".