139490888 has 16 divisors (see below), whose sum is σ = 268614780. Its totient is φ = 67860288.

The previous prime is 139490887. The next prime is 139490891. The reversal of 139490888 is 888094931.

It can be written as a sum of positive squares in 2 ways, for example, as 122367844 + 17123044 = 11062^2 + 4138^2 .

It is not an unprimeable number, because it can be changed into a prime (139490887) 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, 235331 + ... + 235922.

Almost surely, 2^139490888 is an apocalyptic number.

It is an amenable number.

139490888 is a deficient number, since it is larger than the sum of its proper divisors (129123892).

139490888 is a wasteful number, since it uses less digits than its factorization.

139490888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471296 (or 471292 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 139490888 is about 11810.6260629994. The cubic root of 139490888 is about 518.6192263765.

The spelling of 139490888 in words is "one hundred thirty-nine million, four hundred ninety thousand, eight hundred eighty-eight".