64047740 has 48 divisors (see below), whose sum is σ = 141571584. Its totient is φ = 24307200.

The previous prime is 64047733. The next prime is 64047757. The reversal of 64047740 is 4774046.

It is a super-2 number, since 2×64047740² = 8204225998215200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64047697 and 64047706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29285 + ... + 31395.

It is an arithmetic number, because the mean of its divisors is an integer number (2949408).

Almost surely, 2^64047740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64047740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70785792).

64047740 is an abundant number, since it is smaller than the sum of its proper divisors (77523844).

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

64047740 is a wasteful number, since it uses less digits than its factorization.

64047740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198 (or 2196 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 64047740 is about 8002.9831937847. The cubic root of 64047740 is about 400.0994336137.

The spelling of 64047740 in words is "sixty-four million, forty-seven thousand, seven hundred forty".