1982290394 has 24 divisors (see below), whose sum is σ = 3469860180. Its totient is φ = 846859776.

The previous prime is 1982290339. The next prime is 1982290403. The reversal of 1982290394 is 4930922891.

It can be written as a sum of positive squares in 2 ways, for example, as 1295064169 + 687226225 = 35987^2 + 26215^2 .

It is a super-2 number, since 2×1982290394² = 7858950412289350472, 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, 839 + ... + 62970.

Almost surely, 2^1982290394 is an apocalyptic number.

1982290394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1982290394 is a deficient number, since it is larger than the sum of its proper divisors (1487569786).

1982290394 is a wasteful number, since it uses less digits than its factorization.

1982290394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64142 (or 64135 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 1982290394 is about 44522.9198728026. The cubic root of 1982290394 is about 1256.1912349796.

The spelling of 1982290394 in words is "one billion, nine hundred eighty-two million, two hundred ninety thousand, three hundred ninety-four".