1890251157 has 8 divisors (see below), whose sum is σ = 2652984160. Its totient is φ = 1193842800.

The previous prime is 1890251141. The next prime is 1890251189. The reversal of 1890251157 is 7511520981.

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

It is not a de Polignac number, because 1890251157 - 2⁴ = 1890251141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890251557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16581094 + ... + 16581207.

It is an arithmetic number, because the mean of its divisors is an integer number (331623020).

Almost surely, 2^1890251157 is an apocalyptic number.

It is an amenable number.

1890251157 is a deficient number, since it is larger than the sum of its proper divisors (762733003).

1890251157 is a wasteful number, since it uses less digits than its factorization.

1890251157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33162323.

The product of its (nonzero) digits is 25200, while the sum is 39.

The square root of 1890251157 is about 43477.0187225389. The cubic root of 1890251157 is about 1236.4403541651.

The spelling of 1890251157 in words is "one billion, eight hundred ninety million, two hundred fifty-one thousand, one hundred fifty-seven".