64047240 has 128 divisors (see below), whose sum is σ = 220492800. Its totient is φ = 16519680.

The previous prime is 64047239. The next prime is 64047241. The reversal of 64047240 is 4274046.

It is an interprime number because it is at equal distance from previous prime (64047239) and next prime (64047241).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (64047241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32524 + ... + 34436.

It is an arithmetic number, because the mean of its divisors is an integer number (1722600).

Almost surely, 2^64047240 is an apocalyptic number.

64047240 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 64047240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110246400).

64047240 is an abundant number, since it is smaller than the sum of its proper divisors (156445560).

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

64047240 is a wasteful number, since it uses less digits than its factorization.

64047240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964 (or 1954 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 64047240 is about 8002.9519553725. The cubic root of 64047240 is about 400.0983924620.

The spelling of 64047240 in words is "sixty-four million, forty-seven thousand, two hundred forty".