381092690 has 32 divisors (see below), whose sum is σ = 787717440. Its totient is φ = 131284800.

The previous prime is 381092669. The next prime is 381092731. The reversal of 381092690 is 96290183.

It is a super-2 number, since 2×381092690² = 290463276742872200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89081 + ... + 93260.

It is an arithmetic number, because the mean of its divisors is an integer number (24616170).

Almost surely, 2^381092690 is an apocalyptic number.

381092690 is an abundant number, since it is smaller than the sum of its proper divisors (406624750).

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

381092690 is a wasteful number, since it uses less digits than its factorization.

381092690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182378.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 381092690 is about 19521.5954778292. The cubic root of 381092690 is about 725.0092365054.

The spelling of 381092690 in words is "three hundred eighty-one million, ninety-two thousand, six hundred ninety".