142780816 has 10 divisors (see below), whose sum is σ = 276637862. Its totient is φ = 71390400.

The previous prime is 142780793. The next prime is 142780829. The reversal of 142780816 is 618087241.

It can be written as a sum of positive squares in only one way, i.e., 118810000 + 23970816 = 10900^2 + 4896^2 .

It is a super-2 number, since 2×142780816² = 40772722835251712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4461885 + ... + 4461916.

Almost surely, 2^142780816 is an apocalyptic number.

142780816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

142780816 is a deficient number, since it is larger than the sum of its proper divisors (133857046).

142780816 is an equidigital number, since it uses as much as digits as its factorization.

142780816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8923809 (or 8923803 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 142780816 is about 11949.0926852209. The cubic root of 142780816 is about 522.6648408875.

The spelling of 142780816 in words is "one hundred forty-two million, seven hundred eighty thousand, eight hundred sixteen".