64879542 has 128 divisors (see below), whose sum is σ = 180741120. Its totient is φ = 17006112.

The previous prime is 64879541. The next prime is 64879543. The reversal of 64879542 is 24597846.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64879541) and next prime (64879543).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64879541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 397953 + ... + 398115.

It is an arithmetic number, because the mean of its divisors is an integer number (1412040).

Almost surely, 2^64879542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64879542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90370560).

64879542 is an abundant number, since it is smaller than the sum of its proper divisors (115861578).

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

64879542 is a wasteful number, since it uses less digits than its factorization.

64879542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 188 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 64879542 is about 8054.7837959811. The cubic root of 64879542 is about 401.8240486395.

The spelling of 64879542 in words is "sixty-four million, eight hundred seventy-nine thousand, five hundred forty-two".