139392890 has 48 divisors (see below), whose sum is σ = 310531968. Its totient is φ = 44111808.

The previous prime is 139392881. The next prime is 139392917. The reversal of 139392890 is 98293931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5939 + ... + 17721.

It is an arithmetic number, because the mean of its divisors is an integer number (6469416).

Almost surely, 2^139392890 is an apocalyptic number.

139392890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139392890 is an abundant number, since it is smaller than the sum of its proper divisors (171139078).

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

139392890 is a wasteful number, since it uses less digits than its factorization.

139392890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11823 (or 11810 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 139392890 is about 11806.4766124361. The cubic root of 139392890 is about 518.4977475851.

The spelling of 139392890 in words is "one hundred thirty-nine million, three hundred ninety-two thousand, eight hundred ninety".