1990674234 has 24 divisors (see below), whose sum is σ = 4320625140. Its totient is φ = 662404608.

The previous prime is 1990674229. The next prime is 1990674239. The reversal of 1990674234 is 4324760991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1990674229) and next prime (1990674239).

It can be written as a sum of positive squares in 2 ways, for example, as 1971093609 + 19580625 = 44397^2 + 4425^2 .

It is a super-2 number, since 2×1990674234² = 7925567811822973512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1990674234.

It is not an unprimeable number, because it can be changed into a prime (1990674239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85449 + ... + 106220.

Almost surely, 2^1990674234 is an apocalyptic number.

1990674234 is an abundant number, since it is smaller than the sum of its proper divisors (2329950906).

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

1990674234 is a wasteful number, since it uses less digits than its factorization.

1990674234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192254 (or 192251 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1990674234 is about 44616.9724880566. The cubic root of 1990674234 is about 1257.9597100810.

The spelling of 1990674234 in words is "one billion, nine hundred ninety million, six hundred seventy-four thousand, two hundred thirty-four".