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23057783 = 722571831
BaseRepresentation
bin101011111110…
…1010101110111
31121101110022222
41113331111313
521400322113
62142112555
7366662600
oct127752567
947343288
1023057783
1112019721
12787b75b
134a14178
1430c2da7
152056e08
hex15fd577

23057783 has 12 divisors (see below), whose sum is σ = 26941392. Its totient is φ = 19676160.

The previous prime is 23057767. The next prime is 23057819. The reversal of 23057783 is 38775032.

It is not a de Polignac number, because 23057783 - 24 = 23057767 is a prime.

It is a super-2 number, since 2×230577832 = 1063322713750178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23057743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11678 + ... + 13508.

It is an arithmetic number, because the mean of its divisors is an integer number (2245116).

Almost surely, 223057783 is an apocalyptic number.

23057783 is a deficient number, since it is larger than the sum of its proper divisors (3883609).

23057783 is a wasteful number, since it uses less digits than its factorization.

23057783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102 (or 2095 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 23057783 is about 4801.8520385368. The cubic root of 23057783 is about 284.6246541361.

The spelling of 23057783 in words is "twenty-three million, fifty-seven thousand, seven hundred eighty-three".

Divisors: 1 7 49 257 1799 1831 12593 12817 89719 470567 3293969 23057783