42788972 has 6 divisors (see below), whose sum is σ = 74880708. Its totient is φ = 21394484.

The previous prime is 42788971. The next prime is 42789001. The reversal of 42788972 is 27988724.

It is a happy number.

It is a super-2 number, since 2×42788972² = 3661792249633568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42788971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5348618 + ... + 5348625.

It is an arithmetic number, because the mean of its divisors is an integer number (12480118).

Almost surely, 2^42788972 is an apocalyptic number.

It is an amenable number.

42788972 is a deficient number, since it is larger than the sum of its proper divisors (32091736).

42788972 is a wasteful number, since it uses less digits than its factorization.

42788972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10697247 (or 10697245 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 42788972 is about 6541.3279997260. The cubic root of 42788972 is about 349.7657534635.

The spelling of 42788972 in words is "forty-two million, seven hundred eighty-eight thousand, nine hundred seventy-two".