49990128 has 20 divisors (see below), whose sum is σ = 129141288. Its totient is φ = 16663360.

The previous prime is 49990117. The next prime is 49990139. The reversal of 49990128 is 82109994.

It is an interprime number because it is at equal distance from previous prime (49990117) and next prime (49990139).

It is a self number, because there is not a number n which added to its sum of digits gives 49990128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520683 + ... + 520778.

Almost surely, 2^49990128 is an apocalyptic number.

49990128 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

49990128 is an abundant number, since it is smaller than the sum of its proper divisors (79151160).

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

49990128 is a wasteful number, since it uses less digits than its factorization.

49990128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041472 (or 1041466 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 49990128 is about 7070.3697215917. The cubic root of 49990128 is about 368.3789024289.

The spelling of 49990128 in words is "forty-nine million, nine hundred ninety thousand, one hundred twenty-eight".