42749394 has 32 divisors (see below), whose sum is σ = 87531840. Its totient is φ = 13914432.

The previous prime is 42749363. The next prime is 42749401. The reversal of 42749394 is 49394724.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69432 + ... + 70044.

It is an arithmetic number, because the mean of its divisors is an integer number (2735370).

Almost surely, 2^42749394 is an apocalyptic number.

42749394 is an abundant number, since it is smaller than the sum of its proper divisors (44782446).

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

42749394 is a wasteful number, since it uses less digits than its factorization.

42749394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874.

The product of its digits is 217728, while the sum is 42.

The square root of 42749394 is about 6538.3020731685. The cubic root of 42749394 is about 349.6578806588.

The spelling of 42749394 in words is "forty-two million, seven hundred forty-nine thousand, three hundred ninety-four".