1220409490 has 16 divisors (see below), whose sum is σ = 2197872000. Its totient is φ = 487911600.

The previous prime is 1220409479. The next prime is 1220409503. The reversal of 1220409490 is 949040221.

It is a happy number.

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, 10536 + ... + 50515.

It is an arithmetic number, because the mean of its divisors is an integer number (137367000).

Almost surely, 2^1220409490 is an apocalyptic number.

1220409490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220409490 is a deficient number, since it is larger than the sum of its proper divisors (977462510).

1220409490 is a wasteful number, since it uses less digits than its factorization.

1220409490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63057.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1220409490 is about 34934.3597336490. The cubic root of 1220409490 is about 1068.6492665680.

The spelling of 1220409490 in words is "one billion, two hundred twenty million, four hundred nine thousand, four hundred ninety".