513740 has 24 divisors (see below), whose sum is σ = 1143072. Its totient is φ = 193280.

The previous prime is 513739. The next prime is 513749. The reversal of 513740 is 47315.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (513749) 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, 416 + ... + 1095.

It is an arithmetic number, because the mean of its divisors is an integer number (47628).

2⁵¹³⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

513740 is an abundant number, since it is smaller than the sum of its proper divisors (629332).

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

513740 is a wasteful number, since it uses less digits than its factorization.

513740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537 (or 1535 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 513740 is about 716.7565835066. The cubic root of 513740 is about 80.0905225323.

The spelling of 513740 in words is "five hundred thirteen thousand, seven hundred forty".