22778995 has 16 divisors (see below), whose sum is σ = 28068768. Its totient is φ = 17740800.

The previous prime is 22778983. The next prime is 22778999. The reversal of 22778995 is 59987722.

It is not a de Polignac number, because 22778995 - 2⁷ = 22778867 is a prime.

It is a super-2 number, since 2×22778995² = 1037765226420050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22778999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32145 + ... + 32845.

It is an arithmetic number, because the mean of its divisors is an integer number (1754298).

Almost surely, 2^22778995 is an apocalyptic number.

22778995 is a deficient number, since it is larger than the sum of its proper divisors (5289773).

22778995 is an equidigital number, since it uses as much as digits as its factorization.

22778995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its digits is 635040, while the sum is 49.

The square root of 22778995 is about 4772.7345411200. The cubic root of 22778995 is about 283.4728824298.

The spelling of 22778995 in words is "twenty-two million, seven hundred seventy-eight thousand, nine hundred ninety-five".