1890097138 has 8 divisors (see below), whose sum is σ = 2837318832. Its totient is φ = 944324196.

The previous prime is 1890097129. The next prime is 1890097147. The reversal of 1890097138 is 8317900981.

It is an interprime number because it is at equal distance from previous prime (1890097129) and next prime (1890097147).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358920 + ... + 364147.

It is an arithmetic number, because the mean of its divisors is an integer number (354664854).

Almost surely, 2^1890097138 is an apocalyptic number.

1890097138 is a deficient number, since it is larger than the sum of its proper divisors (947221694).

1890097138 is a wasteful number, since it uses less digits than its factorization.

1890097138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724376.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 1890097138 is about 43475.2474173523. The cubic root of 1890097138 is about 1236.4067712417.

The spelling of 1890097138 in words is "one billion, eight hundred ninety million, ninety-seven thousand, one hundred thirty-eight".