42931494 has 48 divisors (see below), whose sum is σ = 99026928. Its totient is φ = 13395456.

The previous prime is 42931487. The next prime is 42931529. The reversal of 42931494 is 49413924.

It is a super-2 number, since 2×42931494² = 3686226354144072, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93714 + ... + 94170.

It is an arithmetic number, because the mean of its divisors is an integer number (2063061).

Almost surely, 2^42931494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42931494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49513464).

42931494 is an abundant number, since it is smaller than the sum of its proper divisors (56095434).

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

42931494 is a wasteful number, since it uses less digits than its factorization.

42931494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 786 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 42931494 is about 6552.2129086287. The cubic root of 42931494 is about 350.1536577011.

The spelling of 42931494 in words is "forty-two million, nine hundred thirty-one thousand, four hundred ninety-four".