42720292 has 12 divisors (see below), whose sum is σ = 78011136. Its totient is φ = 20431400.

The previous prime is 42720283. The next prime is 42720323. The reversal of 42720292 is 29202724.

It is a self number, because there is not a number n which added to its sum of digits gives 42720292.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232084 + ... + 232267.

It is an arithmetic number, because the mean of its divisors is an integer number (6500928).

Almost surely, 2^42720292 is an apocalyptic number.

It is an amenable number.

42720292 is a deficient number, since it is larger than the sum of its proper divisors (35290844).

42720292 is a wasteful number, since it uses less digits than its factorization.

42720292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464378 (or 464376 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 42720292 is about 6536.0761929463. The cubic root of 42720292 is about 349.5785184922.

The spelling of 42720292 in words is "forty-two million, seven hundred twenty thousand, two hundred ninety-two".