28571430 has 16 divisors (see below), whose sum is σ = 68571504. Its totient is φ = 7619040.

The previous prime is 28571423. The next prime is 28571449. The reversal of 28571430 is 3417582.

It is a super-2 number, since 2×28571430² = 1632653224489800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 952381 = 28571430 / (2 + 8 + 5 + 7 + 1 + 4 + 3 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476161 + ... + 476220.

It is an arithmetic number, because the mean of its divisors is an integer number (4285719).

Almost surely, 2^28571430 is an apocalyptic number.

28571430 is an abundant number, since it is smaller than the sum of its proper divisors (40000074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28571430 is a wasteful number, since it uses less digits than its factorization.

28571430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952391.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 28571430 is about 5345.2249718791. The cubic root of 28571430 is about 305.7107138281.

The spelling of 28571430 in words is "twenty-eight million, five hundred seventy-one thousand, four hundred thirty".