64379040 has 192 divisors, whose sum is σ = 225348480. Its totient is φ = 15319040.

The previous prime is 64379023. The next prime is 64379057. The reversal of 64379040 is 4097346.

It is an interprime number because it is at equal distance from previous prime (64379023) and next prime (64379057).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 64378992 and 64379010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469852 + ... + 469988.

It is an arithmetic number, because the mean of its divisors is an integer number (1173690).

Almost surely, 2^64379040 is an apocalyptic number.

64379040 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 64379040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112674240).

64379040 is an abundant number, since it is smaller than the sum of its proper divisors (160969440).

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

64379040 is a wasteful number, since it uses less digits than its factorization.

64379040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 64379040 is about 8023.6550274797. The cubic root of 64379040 is about 400.7881128422.

The spelling of 64379040 in words is "sixty-four million, three hundred seventy-nine thousand, forty".