137660388 has 12 divisors (see below), whose sum is σ = 321207600. Its totient is φ = 45886792.

The previous prime is 137660381. The next prime is 137660389. The reversal of 137660388 is 883066731.

137660388 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

137660388 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (137660381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5735838 + ... + 5735861.

It is an arithmetic number, because the mean of its divisors is an integer number (26767300).

Almost surely, 2^137660388 is an apocalyptic number.

It is an amenable number.

137660388 is an abundant number, since it is smaller than the sum of its proper divisors (183547212).

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

137660388 is a wasteful number, since it uses less digits than its factorization.

137660388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11471706 (or 11471704 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 137660388 is about 11732.8763736775. The cubic root of 137660388 is about 516.3406650128.

The spelling of 137660388 in words is "one hundred thirty-seven million, six hundred sixty thousand, three hundred eighty-eight".