49420138 has 16 divisors (see below), whose sum is σ = 77670144. Its totient is φ = 23554080.

The previous prime is 49420127. The next prime is 49420141. The reversal of 49420138 is 83102494.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 1795 + ... + 10102.

It is an arithmetic number, because the mean of its divisors is an integer number (4854384).

Almost surely, 2^49420138 is an apocalyptic number.

49420138 is a deficient number, since it is larger than the sum of its proper divisors (28250006).

49420138 is a wasteful number, since it uses less digits than its factorization.

49420138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11997.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 49420138 is about 7029.9458034895. The cubic root of 49420138 is about 366.9734554523.

The spelling of 49420138 in words is "forty-nine million, four hundred twenty thousand, one hundred thirty-eight".