1990274008 has 8 divisors (see below), whose sum is σ = 3731763780. Its totient is φ = 995137000.

The previous prime is 1990274003. The next prime is 1990274051. The reversal of 1990274008 is 8004720991.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1990274008² = 7922381253840768128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990274003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124392118 + ... + 124392133.

Almost surely, 2^1990274008 is an apocalyptic number.

It is an amenable number.

1990274008 is a deficient number, since it is larger than the sum of its proper divisors (1741489772).

1990274008 is a wasteful number, since it uses less digits than its factorization.

1990274008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248784257 (or 248784253 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1990274008 is about 44612.4871308471. The cubic root of 1990274008 is about 1257.8753999649.

Adding to 1990274008 its reverse (8004720991), we get a palindrome (9994994999).

The spelling of 1990274008 in words is "one billion, nine hundred ninety million, two hundred seventy-four thousand, eight".