42409660 has 24 divisors (see below), whose sum is σ = 90392400. Its totient is φ = 16710144.

The previous prime is 42409639. The next prime is 42409663. The reversal of 42409660 is 6690424.

It is a super-2 number, since 2×42409660² = 3597158522631200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42409663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14485 + ... + 17164.

It is an arithmetic number, because the mean of its divisors is an integer number (3766350).

Almost surely, 2^42409660 is an apocalyptic number.

It is an amenable number.

42409660 is an abundant number, since it is smaller than the sum of its proper divisors (47982740).

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

42409660 is a wasteful number, since it uses less digits than its factorization.

42409660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31725 (or 31723 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 42409660 is about 6512.2699575494. The cubic root of 42409660 is about 348.7291599080.

The spelling of 42409660 in words is "forty-two million, four hundred nine thousand, six hundred sixty".