139919990 has 96 divisors (see below), whose sum is σ = 312724800. Its totient is φ = 45045504.

The previous prime is 139919963. The next prime is 139919993. The reversal of 139919990 is 99919931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139919993) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1238174 + ... + 1238286.

It is an arithmetic number, because the mean of its divisors is an integer number (3257550).

Almost surely, 2^139919990 is an apocalyptic number.

139919990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139919990 is an abundant number, since it is smaller than the sum of its proper divisors (172804810).

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

139919990 is a wasteful number, since it uses less digits than its factorization.

139919990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 177147, while the sum is 50.

The square root of 139919990 is about 11828.7780433991. The cubic root of 139919990 is about 519.1504743228.

The spelling of 139919990 in words is "one hundred thirty-nine million, nine hundred nineteen thousand, nine hundred ninety".