145900644 has 12 divisors (see below), whose sum is σ = 340434864. Its totient is φ = 48633544.

The previous prime is 145900627. The next prime is 145900691. The reversal of 145900644 is 446009541.

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

It is a super-2 number, since 2×145900644² = 42573995839229472, 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, 6079182 + ... + 6079205.

It is an arithmetic number, because the mean of its divisors is an integer number (28369572).

Almost surely, 2^145900644 is an apocalyptic number.

It is an amenable number.

145900644 is an abundant number, since it is smaller than the sum of its proper divisors (194534220).

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

145900644 is a wasteful number, since it uses less digits than its factorization.

145900644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12158394 (or 12158392 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 145900644 is about 12078.9338933533. The cubic root of 145900644 is about 526.4442698962. Note that the first 3 decimals are identical.

The spelling of 145900644 in words is "one hundred forty-five million, nine hundred thousand, six hundred forty-four".