28153740 has 24 divisors (see below), whose sum is σ = 78830640. Its totient is φ = 7507648.

The previous prime is 28153739. The next prime is 28153747. The reversal of 28153740 is 4735182.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 28153698 and 28153707.

It is not an unprimeable number, because it can be changed into a prime (28153747) 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, 234555 + ... + 234674.

It is an arithmetic number, because the mean of its divisors is an integer number (3284610).

Almost surely, 2^28153740 is an apocalyptic number.

28153740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28153740 is an abundant number, since it is smaller than the sum of its proper divisors (50676900).

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

28153740 is a wasteful number, since it uses less digits than its factorization.

28153740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469241 (or 469239 counting only the distinct ones).

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

The square root of 28153740 is about 5306.0098002171. The cubic root of 28153740 is about 304.2136511728.

It can be divided in two parts, 2815 and 3740, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 28153740 in words is "twenty-eight million, one hundred fifty-three thousand, seven hundred forty".