42780772 has 24 divisors (see below), whose sum is σ = 80067960. Its totient is φ = 19929600.

The previous prime is 42780707. The next prime is 42780779. The reversal of 42780772 is 27708724.

It can be written as a sum of positive squares in 4 ways, for example, as 23561316 + 19219456 = 4854^2 + 4384^2 .

It is not an unprimeable number, because it can be changed into a prime (42780779) 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, 3754 + ... + 9982.

It is an arithmetic number, because the mean of its divisors is an integer number (3336165).

Almost surely, 2^42780772 is an apocalyptic number.

It is an amenable number.

42780772 is a deficient number, since it is larger than the sum of its proper divisors (37287188).

42780772 is a wasteful number, since it uses less digits than its factorization.

42780772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6351 (or 6349 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 42780772 is about 6540.7011856528. The cubic root of 42780772 is about 349.7434092139.

The spelling of 42780772 in words is "forty-two million, seven hundred eighty thousand, seven hundred seventy-two".