47228428 has 24 divisors (see below), whose sum is σ = 91416752. Its totient is φ = 21207744.

The previous prime is 47228399. The next prime is 47228429. The reversal of 47228428 is 82482274.

It is a super-2 number, since 2×47228428² = 4461048822702368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (47228429) 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, 10350 + ... + 14197.

Almost surely, 2^47228428 is an apocalyptic number.

It is an amenable number.

47228428 is a deficient number, since it is larger than the sum of its proper divisors (44188324).

47228428 is a wasteful number, since it uses less digits than its factorization.

47228428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24601 (or 24599 counting only the distinct ones).

The product of its digits is 57344, while the sum is 37.

The square root of 47228428 is about 6872.2942311866. The cubic root of 47228428 is about 361.4663136970.

It can be divided in two parts, 472 and 28428, that added together give a square (28900 = 170²).

The spelling of 47228428 in words is "forty-seven million, two hundred twenty-eight thousand, four hundred twenty-eight".