45978815 has 8 divisors (see below), whose sum is σ = 55455840. Its totient is φ = 36595552.

The previous prime is 45978791. The next prime is 45978839. The reversal of 45978815 is 51887954.

It is an interprime number because it is at equal distance from previous prime (45978791) and next prime (45978839).

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

It is a cyclic number.

It is not a de Polignac number, because 45978815 - 2¹⁶ = 45913279 is a prime.

It is a super-2 number, since 2×45978815² = 4228102857608450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 45978815.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22355 + ... + 24324.

It is an arithmetic number, because the mean of its divisors is an integer number (6931980).

Almost surely, 2^45978815 is an apocalyptic number.

45978815 is a deficient number, since it is larger than the sum of its proper divisors (9477025).

45978815 is a wasteful number, since it uses less digits than its factorization.

45978815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46881.

The product of its digits is 403200, while the sum is 47.

The square root of 45978815 is about 6780.7680243465. The cubic root of 45978815 is about 358.2497736777.

The spelling of 45978815 in words is "forty-five million, nine hundred seventy-eight thousand, eight hundred fifteen".