5391640 has 32 divisors (see below), whose sum is σ = 12462480. Its totient is φ = 2097792.

The previous prime is 5391619. The next prime is 5391643. The reversal of 5391640 is 461935.

It is a junction number, because it is equal to n+sod(n) for n = 5391599 and 5391608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5391643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342 + ... + 3301.

Almost surely, 2^5391640 is an apocalyptic number.

It is an amenable number.

5391640 is an abundant number, since it is smaller than the sum of its proper divisors (7070840).

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

5391640 is a wasteful number, since it uses less digits than its factorization.

5391640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691 (or 3687 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 5391640 is about 2321.9905253898. The cubic root of 5391640 is about 175.3504812784.

It can be divided in two parts, 53916 and 40, that added together give a triangular number (53956 = T₃₂₈).

The spelling of 5391640 in words is "five million, three hundred ninety-one thousand, six hundred forty".