64969740 has 216 divisors, whose sum is σ = 229472880. Its totient is φ = 14826240.

The previous prime is 64969739. The next prime is 64969763. The reversal of 64969740 is 4796946.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 413742 + ... + 413898.

Almost surely, 2^64969740 is an apocalyptic number.

64969740 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 64969740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114736440).

64969740 is an abundant number, since it is smaller than the sum of its proper divisors (164503140).

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

64969740 is a wasteful number, since it uses less digits than its factorization.

64969740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 64969740 is about 8060.3808843007. The cubic root of 64969740 is about 402.0101727581.

The spelling of 64969740 in words is "sixty-four million, nine hundred sixty-nine thousand, seven hundred forty".