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22480987 = 171578423
BaseRepresentation
bin101010111000…
…0100001011011
31120022011010011
41111300201123
521223342422
62121502351
7362041144
oct125604133
946264104
1022480987
1111765331
1276419b7
134871779
142db2acb
151e91077
hex157085b

22480987 has 8 divisors (see below), whose sum is σ = 23957856. Its totient is φ = 21021312.

The previous prime is 22480967. The next prime is 22480999. The reversal of 22480987 is 78908422.

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

It is a cyclic number.

It is not a de Polignac number, because 22480987 - 215 = 22448219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22480937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1543 + ... + 6880.

It is an arithmetic number, because the mean of its divisors is an integer number (2994732).

Almost surely, 222480987 is an apocalyptic number.

22480987 is a deficient number, since it is larger than the sum of its proper divisors (1476869).

22480987 is a wasteful number, since it uses less digits than its factorization.

22480987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8597.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 22480987 is about 4741.4119205148. The cubic root of 22480987 is about 282.2312666195.

The spelling of 22480987 in words is "twenty-two million, four hundred eighty thousand, nine hundred eighty-seven".

Divisors: 1 17 157 2669 8423 143191 1322411 22480987