18487398 has 32 divisors (see below), whose sum is σ = 39381120. Its totient is φ = 5765760.

The previous prime is 18487397. The next prime is 18487409. The reversal of 18487398 is 89378481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18487393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21093 + ... + 21951.

It is an arithmetic number, because the mean of its divisors is an integer number (1230660).

Almost surely, 2^18487398 is an apocalyptic number.

18487398 is an abundant number, since it is smaller than the sum of its proper divisors (20893722).

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

18487398 is a wasteful number, since it uses less digits than its factorization.

18487398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092.

The product of its digits is 387072, while the sum is 48.

The square root of 18487398 is about 4299.6974312154. The cubic root of 18487398 is about 264.4185566673.

The spelling of 18487398 in words is "eighteen million, four hundred eighty-seven thousand, three hundred ninety-eight".