139007780 has 12 divisors (see below), whose sum is σ = 291916380. Its totient is φ = 55603104.

The previous prime is 139007773. The next prime is 139007783. The reversal of 139007780 is 87700931.

It can be written as a sum of positive squares in 2 ways, for example, as 103103716 + 35904064 = 10154^2 + 5992^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 139007780.

It is not an unprimeable number, because it can be changed into a prime (139007783) 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, 3475175 + ... + 3475214.

It is an arithmetic number, because the mean of its divisors is an integer number (24326365).

Almost surely, 2^139007780 is an apocalyptic number.

139007780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139007780 is an abundant number, since it is smaller than the sum of its proper divisors (152908600).

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

139007780 is a wasteful number, since it uses less digits than its factorization.

139007780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6950398 (or 6950396 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 139007780 is about 11790.1560634285. The cubic root of 139007780 is about 518.0198111115.

The spelling of 139007780 in words is "one hundred thirty-nine million, seven thousand, seven hundred eighty".