28151430 has 32 divisors (see below), whose sum is σ = 68191200. Its totient is φ = 7437312.

The previous prime is 28151419. The next prime is 28151443. The reversal of 28151430 is 3415182.

It is a super-2 number, since 2×28151430² = 1585006022089800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28151430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1035 + ... + 7574.

It is an arithmetic number, because the mean of its divisors is an integer number (2130975).

Almost surely, 2^28151430 is an apocalyptic number.

28151430 is an abundant number, since it is smaller than the sum of its proper divisors (40039770).

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

28151430 is a wasteful number, since it uses less digits than its factorization.

28151430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8728.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28151430 is about 5305.7921180536. The cubic root of 28151430 is about 304.2053307536.

The spelling of 28151430 in words is "twenty-eight million, one hundred fifty-one thousand, four hundred thirty".