992155890 has 32 divisors (see below), whose sum is σ = 2597645376. Its totient is φ = 240522560.

The previous prime is 992155883. The next prime is 992155897. The reversal of 992155890 is 98551299.

It is a happy number.

992155890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (992155883) and next prime (992155897).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (992155897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1502937 + ... + 1503596.

It is an arithmetic number, because the mean of its divisors is an integer number (81176418).

Almost surely, 2^992155890 is an apocalyptic number.

992155890 is an abundant number, since it is smaller than the sum of its proper divisors (1605489486).

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

992155890 is a wasteful number, since it uses less digits than its factorization.

992155890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006554.

The product of its (nonzero) digits is 291600, while the sum is 48.

The square root of 992155890 is about 31498.5061550544. The cubic root of 992155890 is about 997.3784300433.

The spelling of 992155890 in words is "nine hundred ninety-two million, one hundred fifty-five thousand, eight hundred ninety".