1215208470 has 32 divisors (see below), whose sum is σ = 3333143808. Its totient is φ = 277761888.

The previous prime is 1215208469. The next prime is 1215208483. The reversal of 1215208470 is 748025121.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2893144 + ... + 2893563.

It is an arithmetic number, because the mean of its divisors is an integer number (104160744).

Almost surely, 2^1215208470 is an apocalyptic number.

1215208470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215208470 is an abundant number, since it is smaller than the sum of its proper divisors (2117935338).

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

1215208470 is a wasteful number, since it uses less digits than its factorization.

1215208470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5786724.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 1215208470 is about 34859.8403610803. The cubic root of 1215208470 is about 1067.1290171200.

The spelling of 1215208470 in words is "one billion, two hundred fifteen million, two hundred eight thousand, four hundred seventy".