22761828 has 18 divisors (see below), whose sum is σ = 57536934. Its totient is φ = 7587264.

The previous prime is 22761821. The next prime is 22761863. The reversal of 22761828 is 82816722.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18301284 + 4460544 = 4278^2 + 2112^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 632273 = 22761828 / (2 + 2 + 7 + 6 + 1 + 8 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 22761792 and 22761801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22761821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 316101 + ... + 316172.

Almost surely, 2^22761828 is an apocalyptic number.

It is an amenable number.

22761828 is an abundant number, since it is smaller than the sum of its proper divisors (34775106).

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

22761828 is a wasteful number, since it uses less digits than its factorization.

22761828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632283 (or 632278 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 22761828 is about 4770.9357572703. The cubic root of 22761828 is about 283.4016530366.

The spelling of 22761828 in words is "twenty-two million, seven hundred sixty-one thousand, eight hundred twenty-eight".