70905240 has 256 divisors, whose sum is σ = 275788800. Its totient is φ = 15869952.

The previous prime is 70905239. The next prime is 70905259. The reversal of 70905240 is 4250907.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 627424 + ... + 627536.

It is an arithmetic number, because the mean of its divisors is an integer number (1077300).

Almost surely, 2^70905240 is an apocalyptic number.

70905240 is a gapful number since it is divisible by the number (70) 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 70905240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137894400).

70905240 is an abundant number, since it is smaller than the sum of its proper divisors (204883560).

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

70905240 is a wasteful number, since it uses less digits than its factorization.

70905240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 70905240 is about 8420.5249242550. The cubic root of 70905240 is about 413.8974751375.

The spelling of 70905240 in words is "seventy million, nine hundred five thousand, two hundred forty".