28940742 has 24 divisors (see below), whose sum is σ = 63329760. Its totient is φ = 9550800.

The previous prime is 28940731. The next prime is 28940789. The reversal of 28940742 is 24704982.

It is a junction number, because it is equal to n+sod(n) for n = 28940697 and 28940706.

It is a congruent number.

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, 6142 + ... + 9777.

It is an arithmetic number, because the mean of its divisors is an integer number (2638740).

Almost surely, 2^28940742 is an apocalyptic number.

28940742 is an abundant number, since it is smaller than the sum of its proper divisors (34389018).

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

28940742 is a wasteful number, since it uses less digits than its factorization.

28940742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16028 (or 16025 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28940742 is about 5379.6600264329. The cubic root of 28940742 is about 307.0222762504.

The spelling of 28940742 in words is "twenty-eight million, nine hundred forty thousand, seven hundred forty-two".