139207780 has 12 divisors (see below), whose sum is σ = 292336380. Its totient is φ = 55683104.

The previous prime is 139207687. The next prime is 139207807. The reversal of 139207780 is 87702931.

It can be written as a sum of positive squares in 2 ways, for example, as 24760576 + 114447204 = 4976^2 + 10698^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3480175 + ... + 3480214.

It is an arithmetic number, because the mean of its divisors is an integer number (24361365).

Almost surely, 2^139207780 is an apocalyptic number.

139207780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139207780 is an abundant number, since it is smaller than the sum of its proper divisors (153128600).

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

139207780 is a wasteful number, since it uses less digits than its factorization.

139207780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960398 (or 6960396 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 139207780 is about 11798.6346667739. The cubic root of 139207780 is about 518.2681289024.

The spelling of 139207780 in words is "one hundred thirty-nine million, two hundred seven thousand, seven hundred eighty".