70421538 has 48 divisors (see below), whose sum is σ = 160697376. Its totient is φ = 20401920.

The previous prime is 70421537. The next prime is 70421551. The reversal of 70421538 is 83512407.

It is not an unprimeable number, because it can be changed into a prime (70421537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33906 + ... + 35922.

It is an arithmetic number, because the mean of its divisors is an integer number (3347862).

Almost surely, 2^70421538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70421538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80348688).

70421538 is an abundant number, since it is smaller than the sum of its proper divisors (90275838).

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

70421538 is a wasteful number, since it uses less digits than its factorization.

70421538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079 (or 2056 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 70421538 is about 8391.7541670380. The cubic root of 70421538 is about 412.9541503155.

The spelling of 70421538 in words is "seventy million, four hundred twenty-one thousand, five hundred thirty-eight".