228157390 has 16 divisors (see below), whose sum is σ = 411052320. Its totient is φ = 91180960.

The previous prime is 228157387. The next prime is 228157403. The reversal of 228157390 is 93751822.

It is a super-2 number, since 2×228157390² = 104111589223224200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2151 + ... + 21469.

It is an arithmetic number, because the mean of its divisors is an integer number (25690770).

Almost surely, 2^228157390 is an apocalyptic number.

228157390 is a deficient number, since it is larger than the sum of its proper divisors (182894930).

228157390 is a wasteful number, since it uses less digits than its factorization.

228157390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20507.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 228157390 is about 15104.8796751249. The cubic root of 228157390 is about 611.0520142547.

The spelling of 228157390 in words is "two hundred twenty-eight million, one hundred fifty-seven thousand, three hundred ninety".