139140388 has 12 divisors (see below), whose sum is σ = 249434892. Its totient is φ = 67873280.

The previous prime is 139140373. The next prime is 139140457. The reversal of 139140388 is 883041931.

It can be written as a sum of positive squares in 2 ways, for example, as 64352484 + 74787904 = 8022^2 + 8648^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424045 + ... + 424372.

It is an arithmetic number, because the mean of its divisors is an integer number (20786241).

Almost surely, 2^139140388 is an apocalyptic number.

It is an amenable number.

139140388 is a deficient number, since it is larger than the sum of its proper divisors (110294504).

139140388 is a wasteful number, since it uses less digits than its factorization.

139140388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848462 (or 848460 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 139140388 is about 11795.7783973759. The cubic root of 139140388 is about 518.1844823240.

The spelling of 139140388 in words is "one hundred thirty-nine million, one hundred forty thousand, three hundred eighty-eight".