91940212 has 24 divisors (see below), whose sum is σ = 198025856. Its totient is φ = 36371808.

The previous prime is 91940207. The next prime is 91940239. The reversal of 91940212 is 21204919.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125928 + ... + 126655.

Almost surely, 2^91940212 is an apocalyptic number.

It is an amenable number.

91940212 is an abundant number, since it is smaller than the sum of its proper divisors (106085644).

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

91940212 is a wasteful number, since it uses less digits than its factorization.

91940212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252607 (or 252605 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 91940212 is about 9588.5458751575. The cubic root of 91940212 is about 451.3379309057.

The spelling of 91940212 in words is "ninety-one million, nine hundred forty thousand, two hundred twelve".