70121808 has 160 divisors (see below), whose sum is σ = 213736320. Its totient is φ = 21980160.

The previous prime is 70121789. The next prime is 70121827. The reversal of 70121808 is 80812107.

It is an interprime number because it is at equal distance from previous prime (70121789) and next prime (70121827).

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

It is a congruent number.

It is an unprimeable number.

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, 655291 + ... + 655397.

It is an arithmetic number, because the mean of its divisors is an integer number (1335852).

Almost surely, 2^70121808 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 70121808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106868160).

70121808 is an abundant number, since it is smaller than the sum of its proper divisors (143614512).

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

70121808 is a wasteful number, since it uses less digits than its factorization.

70121808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 70121808 is about 8373.8765216595. The cubic root of 70121808 is about 412.3674417040.

The spelling of 70121808 in words is "seventy million, one hundred twenty-one thousand, eight hundred eight".