45649820 has 24 divisors (see below), whose sum is σ = 97180944. Its totient is φ = 18009216.

The previous prime is 45649817. The next prime is 45649841. The reversal of 45649820 is 2894654.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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, 14174 + ... + 17093.

It is an arithmetic number, because the mean of its divisors is an integer number (4049206).

Almost surely, 2^45649820 is an apocalyptic number.

It is an amenable number.

45649820 is an abundant number, since it is smaller than the sum of its proper divisors (51531124).

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

45649820 is a wasteful number, since it uses less digits than its factorization.

45649820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31349 (or 31347 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 45649820 is about 6756.4650520816. The cubic root of 45649820 is about 357.3932587582.

The spelling of 45649820 in words is "forty-five million, six hundred forty-nine thousand, eight hundred twenty".