72270020 has 24 divisors (see below), whose sum is σ = 154998144. Its totient is φ = 28292576.

The previous prime is 72270017. The next prime is 72270031. The reversal of 72270020 is 2007227.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 72269974 and 72270001.

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, 37502 + ... + 39381.

It is an arithmetic number, because the mean of its divisors is an integer number (6458256).

Almost surely, 2^72270020 is an apocalyptic number.

It is an amenable number.

72270020 is an abundant number, since it is smaller than the sum of its proper divisors (82728124).

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

72270020 is a wasteful number, since it uses less digits than its factorization.

72270020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76939 (or 76937 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 72270020 is about 8501.1775654906. The cubic root of 72270020 is about 416.5361753149.

Adding to 72270020 its reverse (2007227), we get a palindrome (74277247).

The spelling of 72270020 in words is "seventy-two million, two hundred seventy thousand, twenty".