22697840 has 40 divisors (see below), whose sum is σ = 57572208. Its totient is φ = 8253440.

The previous prime is 22697827. The next prime is 22697863. The reversal of 22697840 is 4879622.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 22697794 and 22697803.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12017 + ... + 13776.

Almost surely, 2^22697840 is an apocalyptic number.

22697840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22697840 is an abundant number, since it is smaller than the sum of its proper divisors (34874368).

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

22697840 is a wasteful number, since it uses less digits than its factorization.

22697840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25817 (or 25811 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 22697840 is about 4764.2250156767. The cubic root of 22697840 is about 283.1358377631.

The spelling of 22697840 in words is "twenty-two million, six hundred ninety-seven thousand, eight hundred forty".