70863780 has 96 divisors (see below), whose sum is σ = 218340864. Its totient is φ = 17063424.

The previous prime is 70863763. The next prime is 70863781. The reversal of 70863780 is 8736807.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (70863781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35694 + ... + 37626.

It is an arithmetic number, because the mean of its divisors is an integer number (2274384).

Almost surely, 2^70863780 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 70863780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109170432).

70863780 is an abundant number, since it is smaller than the sum of its proper divisors (147477084).

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

70863780 is a wasteful number, since it uses less digits than its factorization.

70863780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005 (or 2003 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 70863780 is about 8418.0627225033. The cubic root of 70863780 is about 413.8167874710.

The spelling of 70863780 in words is "seventy million, eight hundred sixty-three thousand, seven hundred eighty".