499901128 has 8 divisors (see below), whose sum is σ = 937314630. Its totient is φ = 249950560.

The previous prime is 499901123. The next prime is 499901173. The reversal of 499901128 is 821109994.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 499164964 + 736164 = 22342^2 + 858^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×499901128² = 499802275551344768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (499901123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31243813 + ... + 31243828.

Almost surely, 2^499901128 is an apocalyptic number.

It is an amenable number.

499901128 is a deficient number, since it is larger than the sum of its proper divisors (437413502).

499901128 is a wasteful number, since it uses less digits than its factorization.

499901128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62487647 (or 62487643 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 499901128 is about 22358.4688205610. The cubic root of 499901128 is about 793.6482060297.

The spelling of 499901128 in words is "four hundred ninety-nine million, nine hundred one thousand, one hundred twenty-eight".