28700478 has 12 divisors (see below), whose sum is σ = 62184408. Its totient is φ = 9566820.

The previous prime is 28700467. The next prime is 28700489. The reversal of 28700478 is 87400782.

It is an interprime number because it is at equal distance from previous prime (28700467) and next prime (28700489).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 797218 + ... + 797253.

It is an arithmetic number, because the mean of its divisors is an integer number (5182034).

Almost surely, 2^28700478 is an apocalyptic number.

28700478 is an abundant number, since it is smaller than the sum of its proper divisors (33483930).

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

28700478 is a wasteful number, since it uses less digits than its factorization.

28700478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594479 (or 1594476 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 28700478 is about 5357.2827067460. The cubic root of 28700478 is about 306.1702884032.

The spelling of 28700478 in words is "twenty-eight million, seven hundred thousand, four hundred seventy-eight".