137439740 has 24 divisors (see below), whose sum is σ = 297935232. Its totient is φ = 53202240.

The previous prime is 137439737. The next prime is 137439751. The reversal of 137439740 is 47934731.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 137439694 and 137439703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110219 + ... + 111458.

It is an arithmetic number, because the mean of its divisors is an integer number (12413968).

Almost surely, 2^137439740 is an apocalyptic number.

137439740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

137439740 is an abundant number, since it is smaller than the sum of its proper divisors (160495492).

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

137439740 is a wasteful number, since it uses less digits than its factorization.

137439740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221717 (or 221715 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 137439740 is about 11723.4696229401. The cubic root of 137439740 is about 516.0646464685.

It can be divided in two parts, 1374 and 39740, that added together give a palindrome (41114).

The spelling of 137439740 in words is "one hundred thirty-seven million, four hundred thirty-nine thousand, seven hundred forty".