1850274981 has 40 divisors (see below), whose sum is σ = 2819133504. Its totient is φ = 1209116160.

The previous prime is 1850274977. The next prime is 1850274983. The reversal of 1850274981 is 1894720581.

It is not a de Polignac number, because 1850274981 - 2² = 1850274977 is a prime.

It is a super-2 number, since 2×1850274981² = 6847035010629100722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1850274983) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1109110 + ... + 1110776.

Almost surely, 2^1850274981 is an apocalyptic number.

It is an amenable number.

1850274981 is a deficient number, since it is larger than the sum of its proper divisors (968858523).

1850274981 is a wasteful number, since it uses less digits than its factorization.

1850274981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943 (or 1934 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1850274981 is about 43014.8228056329. The cubic root of 1850274981 is about 1227.6618460541.

The spelling of 1850274981 in words is "one billion, eight hundred fifty million, two hundred seventy-four thousand, nine hundred eighty-one".