139009990 has 64 divisors (see below), whose sum is σ = 295332480. Its totient is φ = 46126080.

The previous prime is 139009979. The next prime is 139010029. The reversal of 139009990 is 99900931.

Together with 156322490 it forms an amicable pair .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329980 + ... + 330400.

It is an arithmetic number, because the mean of its divisors is an integer number (4614570).

Almost surely, 2^139009990 is an apocalyptic number.

139009990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139009990 is an abundant number, since it is smaller than the sum of its proper divisors (156322490).

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

139009990 is a wasteful number, since it uses less digits than its factorization.

139009990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577.

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 139009990 is about 11790.2497853099. The cubic root of 139009990 is about 518.0225563241.

The spelling of 139009990 in words is "one hundred thirty-nine million, nine thousand, nine hundred ninety".