70721046 has 64 divisors (see below), whose sum is σ = 174101760. Its totient is φ = 21098880.

The previous prime is 70721039. The next prime is 70721047. The reversal of 70721046 is 64012707.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70721047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38910 + ... + 40686.

It is an arithmetic number, because the mean of its divisors is an integer number (2720340).

Almost surely, 2^70721046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70721046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87050880).

70721046 is an abundant number, since it is smaller than the sum of its proper divisors (103380714).

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

70721046 is a wasteful number, since it uses less digits than its factorization.

70721046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866 (or 1860 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 70721046 is about 8409.5806078544. The cubic root of 70721046 is about 413.5387637916.

It can be divided in two parts, 7072 and 1046, that added together give a palindrome (8118).

The spelling of 70721046 in words is "seventy million, seven hundred twenty-one thousand, forty-six".