1631273890 has 16 divisors (see below), whose sum is σ = 2986061760. Its totient is φ = 641449840.

The previous prime is 1631273821. The next prime is 1631273939. The reversal of 1631273890 is 983721361.

It is a super-2 number, since 2×1631273890² = 5322109008391464200, 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, 1381846 + ... + 1383025.

It is an arithmetic number, because the mean of its divisors is an integer number (186628860).

Almost surely, 2^1631273890 is an apocalyptic number.

1631273890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1631273890 is a deficient number, since it is larger than the sum of its proper divisors (1354787870).

1631273890 is a wasteful number, since it uses less digits than its factorization.

1631273890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764937.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1631273890 is about 40389.0318032012. The cubic root of 1631273890 is about 1177.1784280315.

The spelling of 1631273890 in words is "one billion, six hundred thirty-one million, two hundred seventy-three thousand, eight hundred ninety".