145728387 has 24 divisors (see below), whose sum is σ = 241359456. Its totient is φ = 82999296.

The previous prime is 145728383. The next prime is 145728397. The reversal of 145728387 is 783827541.

145728387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145728387 - 2² = 145728383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145728383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16323 + ... + 23619.

It is an arithmetic number, because the mean of its divisors is an integer number (10056644).

Almost surely, 2^145728387 is an apocalyptic number.

145728387 is a deficient number, since it is larger than the sum of its proper divisors (95631069).

145728387 is a wasteful number, since it uses less digits than its factorization.

145728387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7627 (or 7624 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 145728387 is about 12071.8013154624. The cubic root of 145728387 is about 526.2370068803.

The spelling of 145728387 in words is "one hundred forty-five million, seven hundred twenty-eight thousand, three hundred eighty-seven".