65487540 has 24 divisors (see below), whose sum is σ = 183365280. Its totient is φ = 17463328.

The previous prime is 65487533. The next prime is 65487577. The reversal of 65487540 is 4578456.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545670 + ... + 545789.

It is an arithmetic number, because the mean of its divisors is an integer number (7640220).

Almost surely, 2^65487540 is an apocalyptic number.

65487540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65487540 is an abundant number, since it is smaller than the sum of its proper divisors (117877740).

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

65487540 is a wasteful number, since it uses less digits than its factorization.

65487540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091471 (or 1091469 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 65487540 is about 8092.4372101364. The cubic root of 65487540 is about 403.0753368301.

The spelling of 65487540 in words is "sixty-five million, four hundred eighty-seven thousand, five hundred forty".