45747978 has 8 divisors (see below), whose sum is σ = 91495968. Its totient is φ = 15249324.

The previous prime is 45747973. The next prime is 45747979. The reversal of 45747978 is 87974754.

It is a sphenic number, since it is the product of 3 distinct primes.

45747978 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 45747978.

It is not an unprimeable number, because it can be changed into a prime (45747973) 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, 3812326 + ... + 3812337.

It is an arithmetic number, because the mean of its divisors is an integer number (11436996).

Almost surely, 2^45747978 is an apocalyptic number.

45747978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

45747978 is a wasteful number, since it uses less digits than its factorization.

45747978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7624668.

The product of its digits is 1975680, while the sum is 51.

The square root of 45747978 is about 6763.7251570418. The cubic root of 45747978 is about 357.6492356222.

The spelling of 45747978 in words is "forty-five million, seven hundred forty-seven thousand, nine hundred seventy-eight".