139503840 has 96 divisors (see below), whose sum is σ = 502225920. Its totient is φ = 31885824.

The previous prime is 139503821. The next prime is 139503863. The reversal of 139503840 is 48305931.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×139503840² = 38922642749491200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17400 + ... + 24119.

It is an arithmetic number, because the mean of its divisors is an integer number (5231520).

Almost surely, 2^139503840 is an apocalyptic number.

139503840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139503840 is an abundant number, since it is smaller than the sum of its proper divisors (362722080).

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

139503840 is a wasteful number, since it uses less digits than its factorization.

139503840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41544 (or 41536 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 139503840 is about 11811.1743700616. The cubic root of 139503840 is about 518.6352774807.

The spelling of 139503840 in words is "one hundred thirty-nine million, five hundred three thousand, eight hundred forty".