1974371990 has 8 divisors (see below), whose sum is σ = 3553869600. Its totient is φ = 789748792.

The previous prime is 1974371981. The next prime is 1974372011. The reversal of 1974371990 is 991734791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98718590 + ... + 98718609.

It is an arithmetic number, because the mean of its divisors is an integer number (444233700).

Almost surely, 2^1974371990 is an apocalyptic number.

1974371990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1974371990 is a deficient number, since it is larger than the sum of its proper divisors (1579497610).

1974371990 is a wasteful number, since it uses less digits than its factorization.

1974371990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197437206.

The product of its (nonzero) digits is 428652, while the sum is 50.

The square root of 1974371990 is about 44433.9058602775. The cubic root of 1974371990 is about 1254.5163535875.

The spelling of 1974371990 in words is "one billion, nine hundred seventy-four million, three hundred seventy-one thousand, nine hundred ninety".