7398891 has 8 divisors (see below), whose sum is σ = 10961360. Its totient is φ = 4932576.

The previous prime is 7398887. The next prime is 7398899. The reversal of 7398891 is 1988937.

It is not a de Polignac number, because 7398891 - 2² = 7398887 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7398899) 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, 136990 + ... + 137043.

It is an arithmetic number, because the mean of its divisors is an integer number (1370170).

Almost surely, 2^7398891 is an apocalyptic number.

7398891 is a deficient number, since it is larger than the sum of its proper divisors (3562469).

7398891 is a wasteful number, since it uses less digits than its factorization.

7398891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274042 (or 274036 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 7398891 is about 2720.0902558555. The cubic root of 7398891 is about 194.8597808532.

The spelling of 7398891 in words is "seven million, three hundred ninety-eight thousand, eight hundred ninety-one".