139002740 has 24 divisors (see below), whose sum is σ = 292636680. Its totient is φ = 55461888.

The previous prime is 139002719. The next prime is 139002749. The reversal of 139002740 is 47200931.

It can be written as a sum of positive squares in 4 ways, for example, as 17606416 + 121396324 = 4196^2 + 11018^2 .

It is a super-3 number, since 3×139002740³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139002749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317 + ... + 16676.

It is an arithmetic number, because the mean of its divisors is an integer number (12193195).

Almost surely, 2^139002740 is an apocalyptic number.

139002740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139002740 is an abundant number, since it is smaller than the sum of its proper divisors (153633940).

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

139002740 is a wasteful number, since it uses less digits than its factorization.

139002740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17411 (or 17409 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 139002740 is about 11789.9423238623. The cubic root of 139002740 is about 518.0135504274.

The spelling of 139002740 in words is "one hundred thirty-nine million, two thousand, seven hundred forty".