64496340 has 36 divisors (see below), whose sum is σ = 195639444. Its totient is φ = 17198976.

The previous prime is 64496323. The next prime is 64496353. The reversal of 64496340 is 4369446.

64496340 is a `hidden beast` number, since 644 + 9 + 6 + 3 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8964036 + 55532304 = 2994^2 + 7452^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 64496295 and 64496304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178977 + ... + 179336.

It is an arithmetic number, because the mean of its divisors is an integer number (5434429).

Almost surely, 2^64496340 is an apocalyptic number.

64496340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64496340 is an abundant number, since it is smaller than the sum of its proper divisors (131143104).

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

64496340 is a wasteful number, since it uses less digits than its factorization.

64496340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358328 (or 358323 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 64496340 is about 8030.9613372248. The cubic root of 64496340 is about 401.0313800191.

The spelling of 64496340 in words is "sixty-four million, four hundred ninety-six thousand, three hundred forty".