1981254498 has 16 divisors (see below), whose sum is σ = 4054660896. Its totient is φ = 645059520.

The previous prime is 1981254463. The next prime is 1981254551. The reversal of 1981254498 is 8944521891.

It is a super-3 number, since 3×1981254498³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1981254498.

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, 3839383 + ... + 3839898.

It is an arithmetic number, because the mean of its divisors is an integer number (253416306).

Almost surely, 2^1981254498 is an apocalyptic number.

1981254498 is an abundant number, since it is smaller than the sum of its proper divisors (2073406398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1981254498 is a wasteful number, since it uses less digits than its factorization.

1981254498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7679329.

The product of its digits is 829440, while the sum is 51.

The square root of 1981254498 is about 44511.2850634533. The cubic root of 1981254498 is about 1255.9723786811.

The spelling of 1981254498 in words is "one billion, nine hundred eighty-one million, two hundred fifty-four thousand, four hundred ninety-eight".