70389072 has 120 divisors (see below), whose sum is σ = 223423200. Its totient is φ = 20507904.

The previous prime is 70389049. The next prime is 70389107. The reversal of 70389072 is 27098307.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34579 + ... + 36557.

It is an arithmetic number, because the mean of its divisors is an integer number (1861860).

Almost surely, 2^70389072 is an apocalyptic number.

70389072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70389072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111711600).

70389072 is an abundant number, since it is smaller than the sum of its proper divisors (153034128).

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

70389072 is a wasteful number, since it uses less digits than its factorization.

70389072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025 (or 2016 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 70389072 is about 8389.8195451392. The cubic root of 70389072 is about 412.8906800067.

It can be divided in two parts, 7038 and 9072, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 70389072 in words is "seventy million, three hundred eighty-nine thousand, seventy-two".