7421868 has 30 divisors (see below), whose sum is σ = 19403076. Its totient is φ = 2473848.

The previous prime is 7421863. The next prime is 7421891. The reversal of 7421868 is 8681247.

7421868 is nontrivially palindromic in base 5.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (7421863) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11130 + ... + 11777.

Almost surely, 2^7421868 is an apocalyptic number.

It is an amenable number.

7421868 is an abundant number, since it is smaller than the sum of its proper divisors (11981208).

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

7421868 is a wasteful number, since it uses less digits than its factorization.

7421868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22923 (or 22912 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 7421868 is about 2724.3105549845. The cubic root of 7421868 is about 195.0612825139.

It can be divided in two parts, 7 and 421868, that added together give a cube (421875 = 75³).

The spelling of 7421868 in words is "seven million, four hundred twenty-one thousand, eight hundred sixty-eight".