1915398 has 12 divisors (see below), whose sum is σ = 4150068. Its totient is φ = 638460.

The previous prime is 1915343. The next prime is 1915399. The reversal of 1915398 is 8935191.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1915399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53188 + ... + 53223.

It is an arithmetic number, because the mean of its divisors is an integer number (345839).

2^1915398 is an apocalyptic number.

1915398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1915398 is an abundant number, since it is smaller than the sum of its proper divisors (2234670).

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

1915398 is a wasteful number, since it uses less digits than its factorization.

1915398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106419 (or 106416 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1915398 is about 1383.9790460842. The cubic root of 1915398 is about 124.1899188220.

The spelling of 1915398 in words is "one million, nine hundred fifteen thousand, three hundred ninety-eight".