1813147990 has 16 divisors (see below), whose sum is σ = 3265825680. Its totient is φ = 724779360.

The previous prime is 1813147969. The next prime is 1813147991. The reversal of 1813147990 is 997413181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813147991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43905 + ... + 74524.

It is an arithmetic number, because the mean of its divisors is an integer number (204114105).

Almost surely, 2^1813147990 is an apocalyptic number.

1813147990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1813147990 is a deficient number, since it is larger than the sum of its proper divisors (1452677690).

1813147990 is a wasteful number, since it uses less digits than its factorization.

1813147990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119967.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 1813147990 is about 42581.0754913494. The cubic root of 1813147990 is about 1219.3950216487.

The spelling of 1813147990 in words is "one billion, eight hundred thirteen million, one hundred forty-seven thousand, nine hundred ninety".