145645428 has 12 divisors (see below), whose sum is σ = 339839360. Its totient is φ = 48548472.

The previous prime is 145645421. The next prime is 145645457. The reversal of 145645428 is 824546541.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145645421) 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, 6068548 + ... + 6068571.

Almost surely, 2^145645428 is an apocalyptic number.

It is an amenable number.

145645428 is an abundant number, since it is smaller than the sum of its proper divisors (194193932).

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

145645428 is a wasteful number, since it uses less digits than its factorization.

145645428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12137126 (or 12137124 counting only the distinct ones).

The product of its digits is 153600, while the sum is 39.

The square root of 145645428 is about 12068.3647608116. The cubic root of 145645428 is about 526.1371307033.

The spelling of 145645428 in words is "one hundred forty-five million, six hundred forty-five thousand, four hundred twenty-eight".