493551540 has 72 divisors (see below), whose sum is σ = 1517655048. Its totient is φ = 129807360.

The previous prime is 493551523. The next prime is 493551571. The reversal of 493551540 is 45155394.

It can be written as a sum of positive squares in 4 ways, for example, as 6290064 + 487261476 = 2508^2 + 22074^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 493551495 and 493551504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5641 + ... + 31920.

Almost surely, 2^493551540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 493551540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758827524).

493551540 is an abundant number, since it is smaller than the sum of its proper divisors (1024103508).

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

493551540 is a wasteful number, since it uses less digits than its factorization.

493551540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37649 (or 37644 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 493551540 is about 22216.0198955619. The cubic root of 493551540 is about 790.2736540610.

The spelling of 493551540 in words is "four hundred ninety-three million, five hundred fifty-one thousand, five hundred forty".