70621224 has 64 divisors (see below), whose sum is σ = 190218240. Its totient is φ = 21785280.

The previous prime is 70621223. The next prime is 70621241. The reversal of 70621224 is 42212607.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 70621194 and 70621203.

It is not an unprimeable number, because it can be changed into a prime (70621223) 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, 15049 + ... + 19175.

It is an arithmetic number, because the mean of its divisors is an integer number (2972160).

Almost surely, 2^70621224 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 70621224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95109120).

70621224 is an abundant number, since it is smaller than the sum of its proper divisors (119597016).

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

70621224 is a wasteful number, since it uses less digits than its factorization.

70621224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190 (or 4186 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 70621224 is about 8403.6434955322. The cubic root of 70621224 is about 413.3441036620.

The spelling of 70621224 in words is "seventy million, six hundred twenty-one thousand, two hundred twenty-four".