5401644 has 12 divisors (see below), whose sum is σ = 12603864. Its totient is φ = 1800544.

The previous prime is 5401633. The next prime is 5401661. The reversal of 5401644 is 4461045.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225057 + ... + 225080.

It is an arithmetic number, because the mean of its divisors is an integer number (1050322).

Almost surely, 2^5401644 is an apocalyptic number.

It is an amenable number.

5401644 is an abundant number, since it is smaller than the sum of its proper divisors (7202220).

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

5401644 is a wasteful number, since it uses less digits than its factorization.

5401644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450144 (or 450142 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 5401644 is about 2324.1437132845. The cubic root of 5401644 is about 175.4588665054.

Adding to 5401644 its reverse (4461045), we get a palindrome (9862689).

The spelling of 5401644 in words is "five million, four hundred one thousand, six hundred forty-four".