72061224 has 32 divisors (see below), whose sum is σ = 189636000. Its totient is φ = 22756032.

The previous prime is 72061217. The next prime is 72061261. The reversal of 72061224 is 42216027.

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 = 72061194 and 72061203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78559 + ... + 79470.

It is an arithmetic number, because the mean of its divisors is an integer number (5926125).

Almost surely, 2^72061224 is an apocalyptic number.

It is an amenable number.

72061224 is an abundant number, since it is smaller than the sum of its proper divisors (117574776).

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

72061224 is a wasteful number, since it uses less digits than its factorization.

72061224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158057 (or 158053 counting only the distinct ones).

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

The square root of 72061224 is about 8488.8882664340. Note that the first 3 decimals coincide. The cubic root of 72061224 is about 416.1346488438.

The spelling of 72061224 in words is "seventy-two million, sixty-one thousand, two hundred twenty-four".