1990246618 has 16 divisors (see below), whose sum is σ = 3143449440. Its totient is φ = 942462000.

The previous prime is 1990246589. The next prime is 1990246633. The reversal of 1990246618 is 8166420991.

It is a happy number.

It is a super-2 number, since 2×1990246618² = 7922163200920875848, which contains 22 as substring.

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, 171108 + ... + 182368.

It is an arithmetic number, because the mean of its divisors is an integer number (196465590).

Almost surely, 2^1990246618 is an apocalyptic number.

1990246618 is a deficient number, since it is larger than the sum of its proper divisors (1153202822).

1990246618 is a wasteful number, since it uses less digits than its factorization.

1990246618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15933.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1990246618 is about 44612.1801529582. The cubic root of 1990246618 is about 1257.8696296764.

The spelling of 1990246618 in words is "one billion, nine hundred ninety million, two hundred forty-six thousand, six hundred eighteen".