70744890 has 64 divisors (see below), whose sum is σ = 175291776. Its totient is φ = 18262272.

The previous prime is 70744879. The next prime is 70744907. The reversal of 70744890 is 9844707.

It is a super-2 number, since 2×70744890² = 10009678922224200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223012 + ... + 223328.

It is an arithmetic number, because the mean of its divisors is an integer number (2738934).

Almost surely, 2^70744890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70744890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87645888).

70744890 is an abundant number, since it is smaller than the sum of its proper divisors (104546886).

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

70744890 is a wasteful number, since it uses less digits than its factorization.

70744890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543.

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

The square root of 70744890 is about 8410.9981571749. The cubic root of 70744890 is about 413.5852342125.

The spelling of 70744890 in words is "seventy million, seven hundred forty-four thousand, eight hundred ninety".