28140156 has 48 divisors (see below), whose sum is σ = 79591680. Its totient is φ = 8526960.

The previous prime is 28140143. The next prime is 28140187. The reversal of 28140156 is 65104182.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10656 + ... + 13031.

It is an arithmetic number, because the mean of its divisors is an integer number (1658160).

Almost surely, 2^28140156 is an apocalyptic number.

It is an amenable number.

28140156 is an abundant number, since it is smaller than the sum of its proper divisors (51451524).

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

28140156 is a wasteful number, since it uses less digits than its factorization.

28140156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23711 (or 23703 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 28140156 is about 5304.7295878301. The cubic root of 28140156 is about 304.1647162528.

The spelling of 28140156 in words is "twenty-eight million, one hundred forty thousand, one hundred fifty-six".