22340778 has 32 divisors (see below), whose sum is σ = 45734976. Its totient is φ = 7273728.

The previous prime is 22340767. The next prime is 22340819. The reversal of 22340778 is 87704322.

It is a super-2 number, since 2×22340778² = 998220723290568, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56076 + ... + 56472.

It is an arithmetic number, because the mean of its divisors is an integer number (1429218).

Almost surely, 2^22340778 is an apocalyptic number.

22340778 is an abundant number, since it is smaller than the sum of its proper divisors (23394198).

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

22340778 is a wasteful number, since it uses less digits than its factorization.

22340778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 22340778 is about 4726.6032200725. The cubic root of 22340778 is about 281.6433043580.

The spelling of 22340778 in words is "twenty-two million, three hundred forty thousand, seven hundred seventy-eight".