70721298 has 12 divisors (see below), whose sum is σ = 153229518. Its totient is φ = 23573760.

The previous prime is 70721293. The next prime is 70721317. The reversal of 70721298 is 89212707.

It can be written as a sum of positive squares in only one way, i.e., 70610409 + 110889 = 8403^2 + 333^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (70721293) 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 5 ways as a sum of consecutive naturals, for example, 1964463 + ... + 1964498.

Almost surely, 2^70721298 is an apocalyptic number.

70721298 is an abundant number, since it is smaller than the sum of its proper divisors (82508220).

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

70721298 is a wasteful number, since it uses less digits than its factorization.

70721298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928969 (or 3928966 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 70721298 is about 8409.5955907523. The cubic root of 70721298 is about 413.5392549780.

The spelling of 70721298 in words is "seventy million, seven hundred twenty-one thousand, two hundred ninety-eight".