70387744 has 48 divisors (see below), whose sum is σ = 159497856. Its totient is φ = 29952000.

The previous prime is 70387739. The next prime is 70387747. The reversal of 70387744 is 44778307.

It is a junction number, because it is equal to n+sod(n) for n = 70387697 and 70387706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70387747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32784 + ... + 34864.

It is an arithmetic number, because the mean of its divisors is an integer number (3322872).

Almost surely, 2^70387744 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 70387744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79748928).

70387744 is an abundant number, since it is smaller than the sum of its proper divisors (89110112).

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

70387744 is a wasteful number, since it uses less digits than its factorization.

70387744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249 (or 2241 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 40.

The square root of 70387744 is about 8389.7404012282. The cubic root of 70387744 is about 412.8880833808. Note that the first 3 decimals are identical.

It can be divided in two parts, 703877 and 44, that added together give a square (703921 = 839²).

The spelling of 70387744 in words is "seventy million, three hundred eighty-seven thousand, seven hundred forty-four".