142780220 has 24 divisors (see below), whose sum is σ = 327097008. Its totient is φ = 51920000.

The previous prime is 142780213. The next prime is 142780223. The reversal of 142780220 is 22087241.

It is a self number, because there is not a number n which added to its sum of digits gives 142780220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142780223) 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, 324281 + ... + 324720.

It is an arithmetic number, because the mean of its divisors is an integer number (13629042).

Almost surely, 2^142780220 is an apocalyptic number.

142780220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142780220 is an abundant number, since it is smaller than the sum of its proper divisors (184316788).

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

142780220 is a wasteful number, since it uses less digits than its factorization.

142780220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649021 (or 649019 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 142780220 is about 11949.0677460629. The cubic root of 142780220 is about 522.6641136453.

The spelling of 142780220 in words is "one hundred forty-two million, seven hundred eighty thousand, two hundred twenty".