137538720 has 288 divisors, whose sum is σ = 540146880. Its totient is φ = 31518720.

The previous prime is 137538697. The next prime is 137538727. The reversal of 137538720 is 27835731.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (137538727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 300732 + ... + 301188.

It is an arithmetic number, because the mean of its divisors is an integer number (1875510).

Almost surely, 2^137538720 is an apocalyptic number.

137538720 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 137538720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270073440).

137538720 is an abundant number, since it is smaller than the sum of its proper divisors (402608160).

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

137538720 is a wasteful number, since it uses less digits than its factorization.

137538720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 137538720 is about 11727.6903096901. The cubic root of 137538720 is about 516.1885015280.

The spelling of 137538720 in words is "one hundred thirty-seven million, five hundred thirty-eight thousand, seven hundred twenty".