139788620 has 24 divisors (see below), whose sum is σ = 310824864. Its totient is φ = 52626176.

The previous prime is 139788601. The next prime is 139788631. The reversal of 139788620 is 26887931.

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, 205232 + ... + 205911.

It is an arithmetic number, because the mean of its divisors is an integer number (12951036).

Almost surely, 2^139788620 is an apocalyptic number.

139788620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139788620 is an abundant number, since it is smaller than the sum of its proper divisors (171036244).

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

139788620 is a wasteful number, since it uses less digits than its factorization.

139788620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411169 (or 411167 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 139788620 is about 11823.2237566579. The cubic root of 139788620 is about 518.9879477403.

The spelling of 139788620 in words is "one hundred thirty-nine million, seven hundred eighty-eight thousand, six hundred twenty".