791911890 has 160 divisors (see below), whose sum is σ = 2654999424. Its totient is φ = 164540160.

The previous prime is 791911853. The next prime is 791911891. The reversal of 791911890 is 98119197.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (791911891) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 56022 + ... + 68718.

Almost surely, 2^791911890 is an apocalyptic number.

791911890 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 791911890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1327499712).

791911890 is an abundant number, since it is smaller than the sum of its proper divisors (1863087534).

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

791911890 is a wasteful number, since it uses less digits than its factorization.

791911890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12734 (or 12725 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 45.

The square root of 791911890 is about 28140.9290891399. The cubic root of 791911890 is about 925.1786905820.

The spelling of 791911890 in words is "seven hundred ninety-one million, nine hundred eleven thousand, eight hundred ninety".