139420624 has 40 divisors (see below), whose sum is σ = 313793408. Its totient is φ = 58769280.

The previous prime is 139420601. The next prime is 139420627. The reversal of 139420624 is 426024931.

It is a happy number.

It is a super-2 number, since 2×139420624² = 38876220793098752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139420627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3372 + ... + 17035.

Almost surely, 2^139420624 is an apocalyptic number.

139420624 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

139420624 is an abundant number, since it is smaller than the sum of its proper divisors (174372784).

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

139420624 is a wasteful number, since it uses less digits than its factorization.

139420624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20483 (or 20477 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 139420624 is about 11807.6510788556. The cubic root of 139420624 is about 518.5321325597.

The spelling of 139420624 in words is "one hundred thirty-nine million, four hundred twenty thousand, six hundred twenty-four".