22978490 has 8 divisors (see below), whose sum is σ = 41361300. Its totient is φ = 9191392.

The previous prime is 22978481. The next prime is 22978499. The reversal of 22978490 is 9487922.

It is an interprime number because it is at equal distance from previous prime (22978481) and next prime (22978499).

It can be written as a sum of positive squares in 2 ways, for example, as 18861649 + 4116841 = 4343^2 + 2029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×22978490² = 1056022005360200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22978499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148915 + ... + 1148934.

Almost surely, 2^22978490 is an apocalyptic number.

22978490 is a deficient number, since it is larger than the sum of its proper divisors (18382810).

22978490 is a wasteful number, since it uses less digits than its factorization.

22978490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297856.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 22978490 is about 4793.5884262210. The cubic root of 22978490 is about 284.2980158718.

The spelling of 22978490 in words is "twenty-two million, nine hundred seventy-eight thousand, four hundred ninety".