139465780 has 12 divisors (see below), whose sum is σ = 292878180. Its totient is φ = 55786304.

The previous prime is 139465771. The next prime is 139465783. The reversal of 139465780 is 87564931.

It can be written as a sum of positive squares in 2 ways, for example, as 21178404 + 118287376 = 4602^2 + 10876^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139465783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3486625 + ... + 3486664.

It is an arithmetic number, because the mean of its divisors is an integer number (24406515).

Almost surely, 2^139465780 is an apocalyptic number.

139465780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139465780 is an abundant number, since it is smaller than the sum of its proper divisors (153412400).

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

139465780 is a wasteful number, since it uses less digits than its factorization.

139465780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6973298 (or 6973296 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 139465780 is about 11809.5630740515. The cubic root of 139465780 is about 518.5881078017.

The spelling of 139465780 in words is "one hundred thirty-nine million, four hundred sixty-five thousand, seven hundred eighty".