381649810 has 16 divisors (see below), whose sum is σ = 716838336. Its totient is φ = 146022448.

The previous prime is 381649799. The next prime is 381649841. The reversal of 381649810 is 18946183.

It is a super-2 number, since 2×381649810² = 291313154946072200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829444 + ... + 829903.

It is an arithmetic number, because the mean of its divisors is an integer number (44802396).

Almost surely, 2^381649810 is an apocalyptic number.

381649810 is a deficient number, since it is larger than the sum of its proper divisors (335188526).

381649810 is a wasteful number, since it uses less digits than its factorization.

381649810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659377.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 381649810 is about 19535.8595920425. The cubic root of 381649810 is about 725.3623618623.

It can be divided in two parts, 38164 and 9810, that added together give a palindrome (47974).

The spelling of 381649810 in words is "three hundred eighty-one million, six hundred forty-nine thousand, eight hundred ten".