251673872 has 40 divisors (see below), whose sum is σ = 508634112. Its totient is φ = 120499200.

The previous prime is 251673869. The next prime is 251673937. The reversal of 251673872 is 278376152.

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, 45497 + ... + 50727.

Almost surely, 2^251673872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251673872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254317056).

251673872 is an abundant number, since it is smaller than the sum of its proper divisors (256960240).

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

251673872 is a wasteful number, since it uses less digits than its factorization.

251673872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5367 (or 5361 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 251673872 is about 15864.2324743430. The cubic root of 251673872 is about 631.3633630735.

The spelling of 251673872 in words is "two hundred fifty-one million, six hundred seventy-three thousand, eight hundred seventy-two".