7400391 has 4 divisors (see below), whose sum is σ = 9867192. Its totient is φ = 4933592.

The previous prime is 7400381. The next prime is 7400399. The reversal of 7400391 is 1930047.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7400391 - 2¹¹ = 7398343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7400399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233396 + ... + 1233401.

It is an arithmetic number, because the mean of its divisors is an integer number (2466798).

Almost surely, 2^7400391 is an apocalyptic number.

7400391 is a deficient number, since it is larger than the sum of its proper divisors (2466801).

7400391 is a wasteful number, since it uses less digits than its factorization.

7400391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466800.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 7400391 is about 2720.3659680271. The cubic root of 7400391 is about 194.8729481383.

The spelling of 7400391 in words is "seven million, four hundred thousand, three hundred ninety-one".