42779970 has 24 divisors (see below), whose sum is σ = 111228156. Its totient is φ = 11407968.

The previous prime is 42779941. The next prime is 42780013. The reversal of 42779970 is 7997724.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40411449 + 2368521 = 6357^2 + 1539^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237577 + ... + 237756.

Almost surely, 2^42779970 is an apocalyptic number.

42779970 is an abundant number, since it is smaller than the sum of its proper divisors (68448186).

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

42779970 is a wasteful number, since it uses less digits than its factorization.

42779970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475346 (or 475343 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 42779970 is about 6540.6398769539. The cubic root of 42779970 is about 349.7412236840.

The spelling of 42779970 in words is "forty-two million, seven hundred seventy-nine thousand, nine hundred seventy".