499109388 has 12 divisors (see below), whose sum is σ = 1164588600. Its totient is φ = 166369792.

The previous prime is 499109383. The next prime is 499109389. The reversal of 499109388 is 883901994.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×499109388² = 498220362379469088, 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 499109388.

It is not an unprimeable number, because it can be changed into a prime (499109383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20796213 + ... + 20796236.

It is an arithmetic number, because the mean of its divisors is an integer number (97049050).

Almost surely, 2^499109388 is an apocalyptic number.

It is an amenable number.

499109388 is an abundant number, since it is smaller than the sum of its proper divisors (665479212).

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

499109388 is a wasteful number, since it uses less digits than its factorization.

499109388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41592456 (or 41592454 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 499109388 is about 22340.7562092244. The cubic root of 499109388 is about 793.2289930961.

The spelling of 499109388 in words is "four hundred ninety-nine million, one hundred nine thousand, three hundred eighty-eight".