1220693892 has 36 divisors (see below), whose sum is σ = 3108242928. Its totient is φ = 369785600.

The previous prime is 1220693863. The next prime is 1220693909. The reversal of 1220693892 is 2983960221.

It is a super-2 number, since 2×1220693892² = 2980187155932215328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399892 + ... + 402932.

Almost surely, 2^1220693892 is an apocalyptic number.

1220693892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220693892 is an abundant number, since it is smaller than the sum of its proper divisors (1887549036).

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

1220693892 is an equidigital number, since it uses as much as digits as its factorization.

1220693892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6100 (or 3057 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1220693892 is about 34938.4300162443. The cubic root of 1220693892 is about 1068.7322721453.

The spelling of 1220693892 in words is "one billion, two hundred twenty million, six hundred ninety-three thousand, eight hundred ninety-two".