139494740 has 96 divisors (see below), whose sum is σ = 367718400. Its totient is φ = 43182720.

The previous prime is 139494721. The next prime is 139494763. The reversal of 139494740 is 47494931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367871 + ... + 368249.

It is an arithmetic number, because the mean of its divisors is an integer number (3830400).

Almost surely, 2^139494740 is an apocalyptic number.

139494740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139494740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183859200).

139494740 is an abundant number, since it is smaller than the sum of its proper divisors (228223660).

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

139494740 is a wasteful number, since it uses less digits than its factorization.

139494740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 139494740 is about 11810.7891353626. The cubic root of 139494740 is about 518.6240001719.

The spelling of 139494740 in words is "one hundred thirty-nine million, four hundred ninety-four thousand, seven hundred forty".