1220987070 has 24 divisors (see below), whose sum is σ = 3174566616. Its totient is φ = 325596528.

The previous prime is 1220987003. The next prime is 1220987077. The reversal of 1220987070 is 707890221.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220987077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6783172 + ... + 6783351.

It is an arithmetic number, because the mean of its divisors is an integer number (132273609).

Almost surely, 2^1220987070 is an apocalyptic number.

1220987070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220987070 is an abundant number, since it is smaller than the sum of its proper divisors (1953579546).

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

1220987070 is a wasteful number, since it uses less digits than its factorization.

1220987070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13566536 (or 13566533 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 1220987070 is about 34942.6254022219. The cubic root of 1220987070 is about 1068.8178255919.

The spelling of 1220987070 in words is "one billion, two hundred twenty million, nine hundred eighty-seven thousand, seventy".