70072387 has 8 divisors (see below), whose sum is σ = 87363072. Its totient is φ = 54601800.

The previous prime is 70072367. The next prime is 70072417. The reversal of 70072387 is 78327007.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-70072387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70072367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454939 + ... + 455092.

It is an arithmetic number, because the mean of its divisors is an integer number (10920384).

Almost surely, 2^70072387 is an apocalyptic number.

70072387 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

70072387 is a deficient number, since it is larger than the sum of its proper divisors (17290685).

70072387 is a wasteful number, since it uses less digits than its factorization.

70072387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910049.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 70072387 is about 8370.9250982194. The cubic root of 70072387 is about 412.2705417449.

The spelling of 70072387 in words is "seventy million, seventy-two thousand, three hundred eighty-seven".