70236640 has 24 divisors (see below), whose sum is σ = 165934440. Its totient is φ = 28094592.

The previous prime is 70236631. The next prime is 70236643. The reversal of 70236640 is 4663207.

It is a junction number, because it is equal to n+sod(n) for n = 70236599 and 70236608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70236643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219330 + ... + 219649.

It is an arithmetic number, because the mean of its divisors is an integer number (6913935).

Almost surely, 2^70236640 is an apocalyptic number.

It is an amenable number.

70236640 is an abundant number, since it is smaller than the sum of its proper divisors (95697800).

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

70236640 is a wasteful number, since it uses less digits than its factorization.

70236640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438994 (or 438986 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 70236640 is about 8380.7302784423. The cubic root of 70236640 is about 412.5924176156.

Adding to 70236640 its reverse (4663207), we get a palindrome (74899847).

It can be divided in two parts, 70236 and 640, that added together give a triangular number (70876 = T₃₇₆).

The spelling of 70236640 in words is "seventy million, two hundred thirty-six thousand, six hundred forty".