137706780 has 24 divisors (see below), whose sum is σ = 385579152. Its totient is φ = 36721792.

The previous prime is 137706739. The next prime is 137706799. The reversal of 137706780 is 87607731.

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, 1147497 + ... + 1147616.

It is an arithmetic number, because the mean of its divisors is an integer number (16065798).

Almost surely, 2^137706780 is an apocalyptic number.

137706780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

137706780 is an abundant number, since it is smaller than the sum of its proper divisors (247872372).

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

137706780 is a wasteful number, since it uses less digits than its factorization.

137706780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295125 (or 2295123 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 39.

The square root of 137706780 is about 11734.8532159546. The cubic root of 137706780 is about 516.3986613280.

The spelling of 137706780 in words is "one hundred thirty-seven million, seven hundred six thousand, seven hundred eighty".