139724774 has 24 divisors (see below), whose sum is σ = 247157928. Its totient is φ = 59058720.

The previous prime is 139724771. The next prime is 139724797. The reversal of 139724774 is 477427931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139724771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2612 + ... + 16919.

It is an arithmetic number, because the mean of its divisors is an integer number (10298247).

Almost surely, 2^139724774 is an apocalyptic number.

139724774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

139724774 is a deficient number, since it is larger than the sum of its proper divisors (107433154).

139724774 is a wasteful number, since it uses less digits than its factorization.

139724774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19620 (or 19613 counting only the distinct ones).

The product of its digits is 296352, while the sum is 44.

The square root of 139724774 is about 11820.5234232668. The cubic root of 139724774 is about 518.9089228277.

The spelling of 139724774 in words is "one hundred thirty-nine million, seven hundred twenty-four thousand, seven hundred seventy-four".