28861932 has 24 divisors (see below), whose sum is σ = 73467072. Its totient is φ = 8746000.

The previous prime is 28861897. The next prime is 28861933. The reversal of 28861932 is 23916882.

It is a happy number.

It is a super-2 number, since 2×28861932² = 1666022237545248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28861933) 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, 109194 + ... + 109457.

It is an arithmetic number, because the mean of its divisors is an integer number (3061128).

Almost surely, 2^28861932 is an apocalyptic number.

28861932 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28861932 is an abundant number, since it is smaller than the sum of its proper divisors (44605140).

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

28861932 is a wasteful number, since it uses less digits than its factorization.

28861932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218669 (or 218667 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 28861932 is about 5372.3302206771. The cubic root of 28861932 is about 306.7433335936.

The spelling of 28861932 in words is "twenty-eight million, eight hundred sixty-one thousand, nine hundred thirty-two".