890991288 has 96 divisors (see below), whose sum is σ = 2656882800. Its totient is φ = 267494400.

The previous prime is 890991287. The next prime is 890991289. The reversal of 890991288 is 882199098.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (890991287) and next prime (890991289).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890991287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81168 + ... + 91488.

Almost surely, 2^890991288 is an apocalyptic number.

890991288 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 890991288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328441400).

890991288 is an abundant number, since it is smaller than the sum of its proper divisors (1765891512).

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

890991288 is a wasteful number, since it uses less digits than its factorization.

890991288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453 (or 10446 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The square root of 890991288 is about 29849.4771813511. The cubic root of 890991288 is about 962.2571627327.

The spelling of 890991288 in words is "eight hundred ninety million, nine hundred ninety-one thousand, two hundred eighty-eight".