137240840 has 64 divisors (see below), whose sum is σ = 339577920. Its totient is φ = 49504000.

The previous prime is 137240833. The next prime is 137240843. The reversal of 137240840 is 48042731.

It is not an unprimeable number, because it can be changed into a prime (137240843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56450 + ... + 58830.

It is an arithmetic number, because the mean of its divisors is an integer number (5305905).

Almost surely, 2^137240840 is an apocalyptic number.

137240840 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 137240840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169788960).

137240840 is an abundant number, since it is smaller than the sum of its proper divisors (202337080).

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

137240840 is a wasteful number, since it uses less digits than its factorization.

137240840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534 (or 2530 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 137240840 is about 11714.9835680636. The cubic root of 137240840 is about 515.8155801907.

The spelling of 137240840 in words is "one hundred thirty-seven million, two hundred forty thousand, eight hundred forty".