72023070 has 64 divisors (see below), whose sum is σ = 200931840. Its totient is φ = 16180608.

The previous prime is 72023069. The next prime is 72023071. The reversal of 72023070 is 7032027.

It is an interprime number because it is at equal distance from previous prime (72023069) and next prime (72023071).

It is a super-2 number, since 2×72023070² = 10374645224449800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72023071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9484 + ... + 15296.

It is an arithmetic number, because the mean of its divisors is an integer number (3139560).

Almost surely, 2^72023070 is an apocalyptic number.

72023070 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 72023070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100465920).

72023070 is an abundant number, since it is smaller than the sum of its proper divisors (128908770).

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

72023070 is a wasteful number, since it uses less digits than its factorization.

72023070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5889.

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 72023070 is about 8486.6406781482. The cubic root of 72023070 is about 416.0611927672.

Adding to 72023070 its reverse (7032027), we get a palindrome (79055097).

The spelling of 72023070 in words is "seventy-two million, twenty-three thousand, seventy".