24989220 has 36 divisors (see below), whose sum is σ = 75801180. Its totient is φ = 6663744.

The previous prime is 24989203. The next prime is 24989221. The reversal of 24989220 is 2298942.

It can be written as a sum of positive squares in 2 ways, for example, as 8538084 + 16451136 = 2922^2 + 4056^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×24989220² = 1248922232416800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (24989221) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 69235 + ... + 69594.

Almost surely, 2^24989220 is an apocalyptic number.

24989220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

24989220 is an abundant number, since it is smaller than the sum of its proper divisors (50811960).

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

24989220 is a wasteful number, since it uses less digits than its factorization.

24989220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138844 (or 138839 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 24989220 is about 4998.9218837665. The cubic root of 24989220 is about 292.3597398974.

The spelling of 24989220 in words is "twenty-four million, nine hundred eighty-nine thousand, two hundred twenty".