38909418 has 16 divisors (see below), whose sum is σ = 77960640. Its totient is φ = 12946176.

The previous prime is 38909417. The next prime is 38909419. The reversal of 38909418 is 81490983.

It is an interprime number because it is at equal distance from previous prime (38909417) and next prime (38909419).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38909418.

It is not an unprimeable number, because it can be changed into a prime (38909417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2158 + ... + 9081.

It is an arithmetic number, because the mean of its divisors is an integer number (4872540).

Almost surely, 2^38909418 is an apocalyptic number.

38909418 is an abundant number, since it is smaller than the sum of its proper divisors (39051222).

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

38909418 is a wasteful number, since it uses less digits than its factorization.

38909418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11821.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 38909418 is about 6237.7414181737. The cubic root of 38909418 is about 338.8583914427.

The spelling of 38909418 in words is "thirty-eight million, nine hundred nine thousand, four hundred eighteen".