1015678220 has 72 divisors (see below), whose sum is σ = 2207716560. Its totient is φ = 392454400.

The previous prime is 1015678211. The next prime is 1015678247. The reversal of 1015678220 is 228765101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5674091 + ... + 5674269.

It is an arithmetic number, because the mean of its divisors is an integer number (30662730).

Almost surely, 2^1015678220 is an apocalyptic number.

1015678220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1015678220 is an abundant number, since it is smaller than the sum of its proper divisors (1192038340).

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

1015678220 is a wasteful number, since it uses less digits than its factorization.

1015678220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1015678220 is about 31869.7069330736. The cubic root of 1015678220 is about 1005.1989969221.

The spelling of 1015678220 in words is "one billion, fifteen million, six hundred seventy-eight thousand, two hundred twenty".