145631944 has 32 divisors (see below), whose sum is σ = 280759680. Its totient is φ = 70784064.

The previous prime is 145631923. The next prime is 145631953. The reversal of 145631944 is 449136541.

It is a super-2 number, since 2×145631944² = 42417326226438272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57799 + ... + 60265.

It is an arithmetic number, because the mean of its divisors is an integer number (8773740).

Almost surely, 2^145631944 is an apocalyptic number.

It is an amenable number.

145631944 is a deficient number, since it is larger than the sum of its proper divisors (135127736).

145631944 is a wasteful number, since it uses less digits than its factorization.

145631944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677 (or 2673 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 145631944 is about 12067.8060972158. The cubic root of 145631944 is about 526.1208934342.

The spelling of 145631944 in words is "one hundred forty-five million, six hundred thirty-one thousand, nine hundred forty-four".