220776240 has 40 divisors (see below), whose sum is σ = 684407088. Its totient is φ = 58873600.

The previous prime is 220776223. The next prime is 220776251. The reversal of 220776240 is 42677022.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 220776198 and 220776207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459711 + ... + 460190.

Almost surely, 2^220776240 is an apocalyptic number.

220776240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220776240 is an abundant number, since it is smaller than the sum of its proper divisors (463630848).

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

220776240 is a wasteful number, since it uses less digits than its factorization.

220776240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919917 (or 919911 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 220776240 is about 14858.5409781714. The cubic root of 220776240 is about 604.3902423804.

The spelling of 220776240 in words is "two hundred twenty million, seven hundred seventy-six thousand, two hundred forty".