28151004 has 24 divisors (see below), whose sum is σ = 75069568. Its totient is φ = 8043120.

The previous prime is 28150999. The next prime is 28151029. The reversal of 28151004 is 40015182.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 167482 + ... + 167649.

Almost surely, 2^28151004 is an apocalyptic number.

It is an amenable number.

28151004 is an abundant number, since it is smaller than the sum of its proper divisors (46918564).

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

28151004 is a wasteful number, since it uses less digits than its factorization.

28151004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335145 (or 335143 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 28151004 is about 5305.7519730949. The cubic root of 28151004 is about 304.2037962889.

Adding to 28151004 its reverse (40015182), we get a palindrome (68166186).

The spelling of 28151004 in words is "twenty-eight million, one hundred fifty-one thousand, four".