45386991 has 48 divisors (see below), whose sum is σ = 78755040. Its totient is φ = 24883200.

The previous prime is 45386987. The next prime is 45387019. The reversal of 45386991 is 19968354.

It is a happy number.

It is not a de Polignac number, because 45386991 - 2² = 45386987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45386941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37191 + ... + 38391.

It is an arithmetic number, because the mean of its divisors is an integer number (1640730).

Almost surely, 2^45386991 is an apocalyptic number.

45386991 is a deficient number, since it is larger than the sum of its proper divisors (33368049).

45386991 is a wasteful number, since it uses less digits than its factorization.

45386991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1253 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 45386991 is about 6736.9867893592. The cubic root of 45386991 is about 356.7060405285.

The spelling of 45386991 in words is "forty-five million, three hundred eighty-six thousand, nine hundred ninety-one".