70428787 has 16 divisors (see below), whose sum is σ = 83295072. Its totient is φ = 58705920.

The previous prime is 70428779. The next prime is 70428817. The reversal of 70428787 is 78782407.

It is not a de Polignac number, because 70428787 - 2³ = 70428779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70428707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20883 + ... + 24019.

It is an arithmetic number, because the mean of its divisors is an integer number (5205942).

Almost surely, 2^70428787 is an apocalyptic number.

70428787 is a deficient number, since it is larger than the sum of its proper divisors (12866285).

70428787 is a wasteful number, since it uses less digits than its factorization.

70428787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3318.

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 70428787 is about 8392.1860680040. The cubic root of 70428787 is about 412.9683192852.

The spelling of 70428787 in words is "seventy million, four hundred twenty-eight thousand, seven hundred eighty-seven".