49138690 has 16 divisors (see below), whose sum is σ = 88843392. Its totient is φ = 19567984.

The previous prime is 49138679. The next prime is 49138697. The reversal of 49138690 is 9683194.

It is a super-2 number, since 2×49138690² = 4829221709832200, which contains 22 as substring.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (49138697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8554 + ... + 13093.

It is an arithmetic number, because the mean of its divisors is an integer number (5552712).

Almost surely, 2^49138690 is an apocalyptic number.

49138690 is a deficient number, since it is larger than the sum of its proper divisors (39704702).

49138690 is a wasteful number, since it uses less digits than its factorization.

49138690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21881.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 49138690 is about 7009.8994286652. The cubic root of 49138690 is about 366.2754900779.

The spelling of 49138690 in words is "forty-nine million, one hundred thirty-eight thousand, six hundred ninety".