70078890 has 64 divisors (see below), whose sum is σ = 193019904. Its totient is φ = 15951168.

The previous prime is 70078889. The next prime is 70078903. The reversal of 70078890 is 9887007.

It is a super-2 number, since 2×70078890² = 9822101647264200, which contains 22 as substring.

It is a Curzon 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, 63927 + ... + 65013.

It is an arithmetic number, because the mean of its divisors is an integer number (3015936).

Almost surely, 2^70078890 is an apocalyptic number.

70078890 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 70078890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96509952).

70078890 is an abundant number, since it is smaller than the sum of its proper divisors (122941014).

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

70078890 is a wasteful number, since it uses less digits than its factorization.

70078890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411.

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 70078890 is about 8371.3135170056. The cubic root of 70078890 is about 412.2832948065.

The spelling of 70078890 in words is "seventy million, seventy-eight thousand, eight hundred ninety".