45399994 has 4 divisors (see below), whose sum is σ = 68099994. Its totient is φ = 22699996.

The previous prime is 45399989. The next prime is 45400001. The reversal of 45399994 is 49999354.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39853969 + 5546025 = 6313^2 + 2355^2 .

It is a super-2 number, since 2×45399994² = 4122318910400072, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 11349997 + ... + 11350000.

Almost surely, 2^45399994 is an apocalyptic number.

45399994 is a deficient number, since it is larger than the sum of its proper divisors (22700000).

45399994 is a wasteful number, since it uses less digits than its factorization.

45399994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22699999.

The product of its digits is 1574640, while the sum is 52.

The square root of 45399994 is about 6737.9517659301. The cubic root of 45399994 is about 356.7401017259.

The spelling of 45399994 in words is "forty-five million, three hundred ninety-nine thousand, nine hundred ninety-four".