65478390 has 32 divisors (see below), whose sum is σ = 166393440. Its totient is φ = 16433664.

The previous prime is 65478383. The next prime is 65478397. The reversal of 65478390 is 9387456.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (65478383) and next prime (65478397).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65478397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63685 + ... + 64704.

It is an arithmetic number, because the mean of its divisors is an integer number (5199795).

Almost surely, 2^65478390 is an apocalyptic number.

65478390 is an abundant number, since it is smaller than the sum of its proper divisors (100915050).

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

65478390 is a wasteful number, since it uses less digits than its factorization.

65478390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128416.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 65478390 is about 8091.8718477247. The cubic root of 65478390 is about 403.0565632277.

The spelling of 65478390 in words is "sixty-five million, four hundred seventy-eight thousand, three hundred ninety".