91954840 has 16 divisors (see below), whose sum is σ = 206898480. Its totient is φ = 36781920.

The previous prime is 91954829. The next prime is 91954843. The reversal of 91954840 is 4845919.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 2298871 = 91954840 / (9 + 1 + 9 + 5 + 4 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 91954793 and 91954802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91954843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1149396 + ... + 1149475.

It is an arithmetic number, because the mean of its divisors is an integer number (12931155).

Almost surely, 2^91954840 is an apocalyptic number.

It is an amenable number.

91954840 is an abundant number, since it is smaller than the sum of its proper divisors (114943640).

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

91954840 is a wasteful number, since it uses less digits than its factorization.

91954840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298882 (or 2298878 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 91954840 is about 9589.3086299274. The cubic root of 91954840 is about 451.3618661023.

The spelling of 91954840 in words is "ninety-one million, nine hundred fifty-four thousand, eight hundred forty".