722136240 has 120 divisors (see below), whose sum is σ = 2771647008. Its totient is φ = 165058560.

The previous prime is 722136229. The next prime is 722136253. The reversal of 722136240 is 42631227.

722136240 is a `hidden beast` number, since 7 + 22 + 13 + 624 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66601 + ... + 76680.

Almost surely, 2^722136240 is an apocalyptic number.

722136240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

722136240 is an abundant number, since it is smaller than the sum of its proper divisors (2049510768).

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

722136240 is a wasteful number, since it uses less digits than its factorization.

722136240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143307 (or 143298 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 722136240 is about 26872.5927293962. The cubic root of 722136240 is about 897.1664959413.

Adding to 722136240 its reverse (42631227), we get a palindrome (764767467).

It can be divided in two parts, 72 and 2136240, that added together give a palindrome (2136312).

The spelling of 722136240 in words is "seven hundred twenty-two million, one hundred thirty-six thousand, two hundred forty".