64465380 has 108 divisors (see below), whose sum is σ = 227501820. Its totient is φ = 14732928.

The previous prime is 64465369. The next prime is 64465381. The reversal of 64465380 is 8356446.

64465380 is a `hidden beast` number, since 644 + 6 + 5 + 3 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25826724 + 38638656 = 5082^2 + 6216^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64465381) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5166 + ... + 12474.

Almost surely, 2^64465380 is an apocalyptic number.

64465380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64465380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113750910).

64465380 is an abundant number, since it is smaller than the sum of its proper divisors (163036440).

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

64465380 is a wasteful number, since it uses less digits than its factorization.

64465380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7338 (or 7326 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 64465380 is about 8029.0335657537. The cubic root of 64465380 is about 400.9672010868.

The spelling of 64465380 in words is "sixty-four million, four hundred sixty-five thousand, three hundred eighty".