22977840 has 80 divisors (see below), whose sum is σ = 74995200. Its totient is φ = 5803776.

The previous prime is 22977839. The next prime is 22977869. The reversal of 22977840 is 4877922.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×22977840² = 1055962262131200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2041 + ... + 7079.

It is an arithmetic number, because the mean of its divisors is an integer number (937440).

Almost surely, 2^22977840 is an apocalyptic number.

22977840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22977840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37497600).

22977840 is an abundant number, since it is smaller than the sum of its proper divisors (52017360).

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

22977840 is a wasteful number, since it uses less digits than its factorization.

22977840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074 (or 5068 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 22977840 is about 4793.5206268462. The cubic root of 22977840 is about 284.2953351698.

The spelling of 22977840 in words is "twenty-two million, nine hundred seventy-seven thousand, eight hundred forty".