139485878 has 32 divisors (see below), whose sum is σ = 253747200. Its totient is φ = 56173824.

The previous prime is 139485847. The next prime is 139485881. The reversal of 139485878 is 878584931.

It is a super-2 number, since 2×139485878² = 38912620322861768, which contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 31718 + ... + 35846.

It is an arithmetic number, because the mean of its divisors is an integer number (7929600).

Almost surely, 2^139485878 is an apocalyptic number.

139485878 is a deficient number, since it is larger than the sum of its proper divisors (114261322).

139485878 is a wasteful number, since it uses less digits than its factorization.

139485878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4284.

The product of its digits is 1935360, while the sum is 53.

The square root of 139485878 is about 11810.4139639557. The cubic root of 139485878 is about 518.6130173367.

The spelling of 139485878 in words is "one hundred thirty-nine million, four hundred eighty-five thousand, eight hundred seventy-eight".