7399881 has 12 divisors (see below), whose sum is σ = 10758852. Its totient is φ = 4900896.

The previous prime is 7399871. The next prime is 7399883. The reversal of 7399881 is 1889937.

7399881 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4372281 + 3027600 = 2091^2 + 1740^2 .

It is not a de Polignac number, because 7399881 - 2⁶ = 7399817 is a prime.

It is a super-2 number, since 2×7399881² = 109516477628322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7399883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1206 + ... + 4031.

It is an arithmetic number, because the mean of its divisors is an integer number (896571).

Almost surely, 2^7399881 is an apocalyptic number.

It is an amenable number.

7399881 is a deficient number, since it is larger than the sum of its proper divisors (3358971).

7399881 is a wasteful number, since it uses less digits than its factorization.

7399881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400 (or 5397 counting only the distinct ones).

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

The square root of 7399881 is about 2720.2722290241. The cubic root of 7399881 is about 194.8684714610.

The spelling of 7399881 in words is "seven million, three hundred ninety-nine thousand, eight hundred eighty-one".