22649487 has 16 divisors (see below), whose sum is σ = 34659072. Its totient is φ = 12888000.

The previous prime is 22649479. The next prime is 22649489. The reversal of 22649487 is 78494622.

It is not a de Polignac number, because 22649487 - 2³ = 22649479 is a prime.

It is a super-2 number, since 2×22649487² = 1025998522726338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22649489) 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, 3123 + ... + 7419.

It is an arithmetic number, because the mean of its divisors is an integer number (2166192).

Almost surely, 2^22649487 is an apocalyptic number.

22649487 is a deficient number, since it is larger than the sum of its proper divisors (12009585).

22649487 is a wasteful number, since it uses less digits than its factorization.

22649487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4558.

The product of its digits is 193536, while the sum is 42.

The square root of 22649487 is about 4759.1477178167. The cubic root of 22649487 is about 282.9346409349.

The spelling of 22649487 in words is "twenty-two million, six hundred forty-nine thousand, four hundred eighty-seven".