145638672 has 40 divisors (see below), whose sum is σ = 378996576. Its totient is φ = 48189696.

The previous prime is 145638671. The next prime is 145638673. The reversal of 145638672 is 276836541.

It is an interprime number because it is at equal distance from previous prime (145638671) and next prime (145638673).

It is not an unprimeable number, because it can be changed into a prime (145638671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4498 + ... + 17649.

Almost surely, 2^145638672 is an apocalyptic number.

145638672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145638672 is an abundant number, since it is smaller than the sum of its proper divisors (233357904).

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

145638672 is a wasteful number, since it uses less digits than its factorization.

145638672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22295 (or 22289 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 145638672 is about 12068.0848522042. The cubic root of 145638672 is about 526.1289953354.

The spelling of 145638672 in words is "one hundred forty-five million, six hundred thirty-eight thousand, six hundred seventy-two".