28691142 has 32 divisors (see below), whose sum is σ = 58752000. Its totient is φ = 9338208.

The previous prime is 28691137. The next prime is 28691153. The reversal of 28691142 is 24119682.

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, 59659 + ... + 60137.

It is an arithmetic number, because the mean of its divisors is an integer number (1836000).

Almost surely, 2^28691142 is an apocalyptic number.

28691142 is an abundant number, since it is smaller than the sum of its proper divisors (30060858).

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

28691142 is a wasteful number, since it uses less digits than its factorization.

28691142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700.

The product of its digits is 6912, while the sum is 33.

The square root of 28691142 is about 5356.4112986215. The cubic root of 28691142 is about 306.1370866820.

The spelling of 28691142 in words is "twenty-eight million, six hundred ninety-one thousand, one hundred forty-two".