228779901 has 12 divisors (see below), whose sum is σ = 377668512. Its totient is φ = 130731336.

The previous prime is 228779891. The next prime is 228779911. The reversal of 228779901 is 109977822.

It is an interprime number because it is at equal distance from previous prime (228779891) and next prime (228779911).

It is not a de Polignac number, because 228779901 - 2¹³ = 228771709 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228779911) 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, 1815651 + ... + 1815776.

It is an arithmetic number, because the mean of its divisors is an integer number (31472376).

Almost surely, 2^228779901 is an apocalyptic number.

228779901 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

228779901 is a deficient number, since it is larger than the sum of its proper divisors (148888611).

228779901 is a wasteful number, since it uses less digits than its factorization.

228779901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3631440 (or 3631437 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 228779901 is about 15125.4719265218. The cubic root of 228779901 is about 611.6072467215.

The spelling of 228779901 in words is "two hundred twenty-eight million, seven hundred seventy-nine thousand, nine hundred one".