139124840 has 32 divisors (see below), whose sum is σ = 329508000. Its totient is φ = 52720704.

The previous prime is 139124837. The next prime is 139124857. The reversal of 139124840 is 48421931.

It is a happy number.

It is a super-2 number, since 2×139124840² = 38711442210051200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139124797 and 139124806.

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, 90770 + ... + 92289.

It is an arithmetic number, because the mean of its divisors is an integer number (10297125).

Almost surely, 2^139124840 is an apocalyptic number.

139124840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139124840 is an abundant number, since it is smaller than the sum of its proper divisors (190383160).

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

139124840 is a wasteful number, since it uses less digits than its factorization.

139124840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183089 (or 183085 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 139124840 is about 11795.1193296210. The cubic root of 139124840 is about 518.1651803979.

The spelling of 139124840 in words is "one hundred thirty-nine million, one hundred twenty-four thousand, eight hundred forty".