139735540 has 24 divisors (see below), whose sum is σ = 335365632. Its totient is φ = 47909280.

The previous prime is 139735523. The next prime is 139735549. The reversal of 139735540 is 45537931.

It is a super-2 number, since 2×139735540² = 39052042278183200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139735540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139735549) 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, 498916 + ... + 499195.

It is an arithmetic number, because the mean of its divisors is an integer number (13973568).

Almost surely, 2^139735540 is an apocalyptic number.

139735540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139735540 is an abundant number, since it is smaller than the sum of its proper divisors (195630092).

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

139735540 is a wasteful number, since it uses less digits than its factorization.

139735540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998127 (or 998125 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 139735540 is about 11820.9788088804. The cubic root of 139735540 is about 518.9222500514.

The spelling of 139735540 in words is "one hundred thirty-nine million, seven hundred thirty-five thousand, five hundred forty".