91922040 has 288 divisors, whose sum is σ = 362260080. Its totient is φ = 20901888.

The previous prime is 91922027. The next prime is 91922069. The reversal of 91922040 is 4022919.

It is a super-2 number, since 2×91922040² = 16899322875523200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 91921995 and 91922013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 476184 + ... + 476376.

Almost surely, 2^91922040 is an apocalyptic number.

91922040 is a gapful number since it is divisible by the number (90) 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 91922040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181130040).

91922040 is an abundant number, since it is smaller than the sum of its proper divisors (270338040).

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

91922040 is a wasteful number, since it uses less digits than its factorization.

91922040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 91922040 is about 9587.5982393924. The cubic root of 91922040 is about 451.3081932711.

Adding to 91922040 its reverse (4022919), we get a palindrome (95944959).

The spelling of 91922040 in words is "ninety-one million, nine hundred twenty-two thousand, forty".