139481540 has 36 divisors (see below), whose sum is σ = 321965868. Its totient is φ = 50719680.

The previous prime is 139481539. The next prime is 139481567. The reversal of 139481540 is 45184931.

It can be written as a sum of positive squares in 2 ways, for example, as 66618244 + 72863296 = 8162^2 + 8536^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 139481540.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26399 + ... + 31238.

Almost surely, 2^139481540 is an apocalyptic number.

139481540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139481540 is an abundant number, since it is smaller than the sum of its proper divisors (182484328).

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

139481540 is a wasteful number, since it uses less digits than its factorization.

139481540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57668 (or 57655 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 139481540 is about 11810.2303110481. The cubic root of 139481540 is about 518.6076410061.

The spelling of 139481540 in words is "one hundred thirty-nine million, four hundred eighty-one thousand, five hundred forty".