70224138 has 32 divisors (see below), whose sum is σ = 161438400. Its totient is φ = 22600368.

The previous prime is 70224137. The next prime is 70224151. The reversal of 70224138 is 83142207.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (70224131) 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 15 ways as a sum of consecutive naturals, for example, 20856 + ... + 23987.

It is an arithmetic number, because the mean of its divisors is an integer number (5044950).

Almost surely, 2^70224138 is an apocalyptic number.

70224138 is an abundant number, since it is smaller than the sum of its proper divisors (91214262).

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

70224138 is a wasteful number, since it uses less digits than its factorization.

70224138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44883 (or 44877 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 70224138 is about 8379.9843675272. The cubic root of 70224138 is about 412.5679359182.

The spelling of 70224138 in words is "seventy million, two hundred twenty-four thousand, one hundred thirty-eight".