42691930 has 32 divisors (see below), whose sum is σ = 82161216. Its totient is φ = 15915264.

The previous prime is 42691919. The next prime is 42691951. The reversal of 42691930 is 3919624.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 17017 + ... + 19363.

It is an arithmetic number, because the mean of its divisors is an integer number (2567538).

Almost surely, 2^42691930 is an apocalyptic number.

42691930 is a deficient number, since it is larger than the sum of its proper divisors (39469286).

42691930 is a wasteful number, since it uses less digits than its factorization.

42691930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 42691930 is about 6533.9061823690. The cubic root of 42691930 is about 349.5011396447.

The spelling of 42691930 in words is "forty-two million, six hundred ninety-one thousand, nine hundred thirty".