28749970 has 16 divisors (see below), whose sum is σ = 51937920. Its totient is φ = 11458224.

The previous prime is 28749967. The next prime is 28750019. The reversal of 28749970 is 7994782.

It is a self number, because there is not a number n which added to its sum of digits gives 28749970.

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, 2250 + ... + 7909.

It is an arithmetic number, because the mean of its divisors is an integer number (3246120).

Almost surely, 2^28749970 is an apocalyptic number.

28749970 is a deficient number, since it is larger than the sum of its proper divisors (23187950).

28749970 is a wasteful number, since it uses less digits than its factorization.

28749970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10449.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 28749970 is about 5361.8998498666. The cubic root of 28749970 is about 306.3461772062.

The spelling of 28749970 in words is "twenty-eight million, seven hundred forty-nine thousand, nine hundred seventy".