42090736 has 20 divisors (see below), whose sum is σ = 85097232. Its totient is φ = 20130176.

The previous prime is 42090733. The next prime is 42090739. The reversal of 42090736 is 63709024.

It is an interprime number because it is at equal distance from previous prime (42090733) and next prime (42090739).

It is a junction number, because it is equal to n+sod(n) for n = 42090698 and 42090707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42090731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56821 + ... + 57556.

Almost surely, 2^42090736 is an apocalyptic number.

42090736 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

42090736 is an abundant number, since it is smaller than the sum of its proper divisors (43006496).

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

42090736 is a wasteful number, since it uses less digits than its factorization.

42090736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114408 (or 114402 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 42090736 is about 6487.7373559663. The cubic root of 42090736 is about 347.8528025023.

The spelling of 42090736 in words is "forty-two million, ninety thousand, seven hundred thirty-six".