65784490 has 16 divisors (see below), whose sum is σ = 120932352. Its totient is φ = 25753744.

The previous prime is 65784487. The next prime is 65784493. The reversal of 65784490 is 9448756.

It is an interprime number because it is at equal distance from previous prime (65784487) and next prime (65784493).

It is not an unprimeable number, because it can be changed into a prime (65784493) 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, 69514 + ... + 70453.

It is an arithmetic number, because the mean of its divisors is an integer number (7558272).

Almost surely, 2^65784490 is an apocalyptic number.

65784490 is a deficient number, since it is larger than the sum of its proper divisors (55147862).

65784490 is a wasteful number, since it uses less digits than its factorization.

65784490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140021.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 65784490 is about 8110.7638357925. The cubic root of 65784490 is about 403.6836599876.

The spelling of 65784490 in words is "sixty-five million, seven hundred eighty-four thousand, four hundred ninety".