145397388 has 12 divisors (see below), whose sum is σ = 339260600. Its totient is φ = 48465792.

The previous prime is 145397341. The next prime is 145397393. The reversal of 145397388 is 883793541.

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

It is a super-2 number, since 2×145397388² = 42280800874445088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6058213 + ... + 6058236.

Almost surely, 2^145397388 is an apocalyptic number.

It is an amenable number.

145397388 is an abundant number, since it is smaller than the sum of its proper divisors (193863212).

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

145397388 is a wasteful number, since it uses less digits than its factorization.

145397388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12116456 (or 12116454 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 145397388 is about 12058.0839273908. The cubic root of 145397388 is about 525.8382834507.

The spelling of 145397388 in words is "one hundred forty-five million, three hundred ninety-seven thousand, three hundred eighty-eight".