42099780 has 48 divisors (see below), whose sum is σ = 120395520. Its totient is φ = 10987008.

The previous prime is 42099779. The next prime is 42099791. The reversal of 42099780 is 8799024.

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, 4645 + ... + 10284.

It is an arithmetic number, because the mean of its divisors is an integer number (2508240).

Almost surely, 2^42099780 is an apocalyptic number.

It is an amenable number.

42099780 is an abundant number, since it is smaller than the sum of its proper divisors (78295740).

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

42099780 is a wasteful number, since it uses less digits than its factorization.

42099780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14988 (or 14986 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 42099780 is about 6488.4343257831. The cubic root of 42099780 is about 347.8777149950.

The spelling of 42099780 in words is "forty-two million, ninety-nine thousand, seven hundred eighty".