228651957 has 16 divisors (see below), whose sum is σ = 347007360. Its totient is φ = 148716000.

The previous prime is 228651949. The next prime is 228651959. The reversal of 228651957 is 759156822.

228651957 is a `hidden beast` number, since 2 + 2 + 86 + 519 + 57 = 666.

It is not a de Polignac number, because 228651957 - 2³ = 228651949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228651959) 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, 102169 + ... + 104382.

It is an arithmetic number, because the mean of its divisors is an integer number (21687960).

Almost surely, 2^228651957 is an apocalyptic number.

228651957 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

228651957 is a deficient number, since it is larger than the sum of its proper divisors (118355403).

228651957 is a wasteful number, since it uses less digits than its factorization.

228651957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206601 (or 206595 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 228651957 is about 15121.2419132821. The cubic root of 228651957 is about 611.4932127103.

The spelling of 228651957 in words is "two hundred twenty-eight million, six hundred fifty-one thousand, nine hundred fifty-seven".