381692736 has 154 divisors (see below), whose sum is σ = 1147374642. Its totient is φ = 125971200.

The previous prime is 381692723. The next prime is 381692741. The reversal of 381692736 is 637296183.

It can be written as a sum of positive squares in only one way, i.e., 377913600 + 3779136 = 19440^2 + 1944^2 .

It is a plaindrome in base 14.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 381692691 and 381692700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 3779086 + ... + 3779186.

Almost surely, 2^381692736 is an apocalyptic number.

381692736 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381692736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573687321).

381692736 is an abundant number, since it is smaller than the sum of its proper divisors (765681906).

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

381692736 is an frugal number, since it uses more digits than its factorization.

381692736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 106 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 381692736 is about 19536.9582074590. The cubic root of 381692736 is about 725.3895558471.

The spelling of 381692736 in words is "three hundred eighty-one million, six hundred ninety-two thousand, seven hundred thirty-six".