5405994 has 64 divisors (see below), whose sum is σ = 13824000. Its totient is φ = 1548720.

The previous prime is 5405971. The next prime is 5405999. The reversal of 5405994 is 4995045.

It is a super-2 number, since 2×5405994² = 58449542256072, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5405999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11047 + ... + 11525.

It is an arithmetic number, because the mean of its divisors is an integer number (216000).

Almost surely, 2^5405994 is an apocalyptic number.

5405994 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5405994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6912000).

5405994 is an abundant number, since it is smaller than the sum of its proper divisors (8418006).

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

5405994 is a wasteful number, since it uses less digits than its factorization.

5405994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 5405994 is about 2325.0793534845. The cubic root of 5405994 is about 175.5059534835.

The spelling of 5405994 in words is "five million, four hundred five thousand, nine hundred ninety-four".