84702640 has 80 divisors (see below), whose sum is σ = 217191456. Its totient is φ = 30464000.

The previous prime is 84702623. The next prime is 84702643. The reversal of 84702640 is 4620748.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (84702643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88404 + ... + 89356.

Almost surely, 2^84702640 is an apocalyptic number.

84702640 is a gapful number since it is divisible by the number (80) 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 84702640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108595728).

84702640 is an abundant number, since it is smaller than the sum of its proper divisors (132488816).

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

84702640 is a wasteful number, since it uses less digits than its factorization.

84702640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 84702640 is about 9203.4037181904. The cubic root of 84702640 is about 439.1696460896.

The spelling of 84702640 in words is "eighty-four million, seven hundred two thousand, six hundred forty".