70542240 has 96 divisors (see below), whose sum is σ = 223425216. Its totient is φ = 18708480.

The previous prime is 70542209. The next prime is 70542257. The reversal of 70542240 is 4224507.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 70542240.

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, 134619 + ... + 135141.

It is an arithmetic number, because the mean of its divisors is an integer number (2327346).

Almost surely, 2^70542240 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 70542240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111712608).

70542240 is an abundant number, since it is smaller than the sum of its proper divisors (152882976).

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

70542240 is a wasteful number, since it uses less digits than its factorization.

70542240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 814 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 70542240 is about 8398.9427906136. The cubic root of 70542240 is about 413.1899491099.

Adding to 70542240 its reverse (4224507), we get a palindrome (74766747).

The spelling of 70542240 in words is "seventy million, five hundred forty-two thousand, two hundred forty".