139037890 has 16 divisors (see below), whose sum is σ = 258898680. Its totient is φ = 53697280.

The previous prime is 139037881. The next prime is 139037903. The reversal of 139037890 is 98730931.

It can be written as a sum of positive squares in 4 ways, for example, as 64336441 + 74701449 = 8021^2 + 8643^2 .

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, 239431 + ... + 240010.

Almost surely, 2^139037890 is an apocalyptic number.

139037890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139037890 is a deficient number, since it is larger than the sum of its proper divisors (119860790).

139037890 is a wasteful number, since it uses less digits than its factorization.

139037890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479477.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 139037890 is about 11791.4329069880. The cubic root of 139037890 is about 518.0572105781.

The spelling of 139037890 in words is "one hundred thirty-nine million, thirty-seven thousand, eight hundred ninety".