38445918 has 16 divisors (see below), whose sum is σ = 87876480. Its totient is φ = 10984536.

The previous prime is 38445907. The next prime is 38445973. The reversal of 38445918 is 81954483.

38445918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×38445918² = 2956177221725448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 915379 = 38445918 / (3 + 8 + 4 + 4 + 5 + 9 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 38445918.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457648 + ... + 457731.

It is an arithmetic number, because the mean of its divisors is an integer number (5492280).

Almost surely, 2^38445918 is an apocalyptic number.

38445918 is an abundant number, since it is smaller than the sum of its proper divisors (49430562).

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

38445918 is a wasteful number, since it uses less digits than its factorization.

38445918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915391.

The product of its digits is 138240, while the sum is 42.

The square root of 38445918 is about 6200.4772396970. The cubic root of 38445918 is about 337.5074873510.

The spelling of 38445918 in words is "thirty-eight million, four hundred forty-five thousand, nine hundred eighteen".