428723244 has 36 divisors (see below), whose sum is σ = 1108923816. Its totient is φ = 139583808.

The previous prime is 428723231. The next prime is 428723249. The reversal of 428723244 is 442327824.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 428723199 and 428723208.

It is not an unprimeable number, because it can be changed into a prime (428723249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136929 + ... + 140024.

Almost surely, 2^428723244 is an apocalyptic number.

It is an amenable number.

428723244 is an abundant number, since it is smaller than the sum of its proper divisors (680200572).

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

428723244 is a wasteful number, since it uses less digits than its factorization.

428723244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277006 (or 277001 counting only the distinct ones).

The product of its digits is 86016, while the sum is 36.

The square root of 428723244 is about 20705.6331465618. The cubic root of 428723244 is about 754.0364557278.

The spelling of 428723244 in words is "four hundred twenty-eight million, seven hundred twenty-three thousand, two hundred forty-four".