28761900 has 36 divisors (see below), whose sum is σ = 83218632. Its totient is φ = 7669760.

The previous prime is 28761857. The next prime is 28761919. The reversal of 28761900 is 916782.

It is a super-2 number, since 2×28761900² = 1654493783220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47637 + ... + 48236.

Almost surely, 2^28761900 is an apocalyptic number.

28761900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28761900 is an abundant number, since it is smaller than the sum of its proper divisors (54456732).

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

28761900 is a wasteful number, since it uses less digits than its factorization.

28761900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95890 (or 95883 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 28761900 is about 5363.0122132995. The cubic root of 28761900 is about 306.3885448387.

The spelling of 28761900 in words is "twenty-eight million, seven hundred sixty-one thousand, nine hundred".