28997442 has 12 divisors (see below), whose sum is σ = 62827830. Its totient is φ = 9665808.

The previous prime is 28997417. The next prime is 28997453. The reversal of 28997442 is 24479982.

It can be written as a sum of positive squares in only one way, i.e., 28611801 + 385641 = 5349^2 + 621^2 .

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, 805467 + ... + 805502.

Almost surely, 2^28997442 is an apocalyptic number.

28997442 is an abundant number, since it is smaller than the sum of its proper divisors (33830388).

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

28997442 is a wasteful number, since it uses less digits than its factorization.

28997442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610977 (or 1610974 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28997442 is about 5384.9272975594. The cubic root of 28997442 is about 307.2226489852. Note that the first 3 decimals are identical.

The spelling of 28997442 in words is "twenty-eight million, nine hundred ninety-seven thousand, four hundred forty-two".