1220894904 has 32 divisors (see below), whose sum is σ = 3097797120. Its totient is φ = 400890336.

The previous prime is 1220894903. The next prime is 1220894911. The reversal of 1220894904 is 4094980221.

It is a super-2 number, since 2×1220894904² = 2981168733226338432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220894903) 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, 378024 + ... + 381239.

It is an arithmetic number, because the mean of its divisors is an integer number (96806160).

Almost surely, 2^1220894904 is an apocalyptic number.

It is an amenable number.

1220894904 is an abundant number, since it is smaller than the sum of its proper divisors (1876902216).

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

1220894904 is a wasteful number, since it uses less digits than its factorization.

1220894904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759339 (or 759335 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1220894904 is about 34941.3065582843. The cubic root of 1220894904 is about 1068.7909317383.

The spelling of 1220894904 in words is "one billion, two hundred twenty million, eight hundred ninety-four thousand, nine hundred four".