626142240 has 72 divisors (see below), whose sum is σ = 2136715308. Its totient is φ = 166970880.

The previous prime is 626142203. The next prime is 626142241. The reversal of 626142240 is 42241626.

626142240 is a `hidden beast` number, since 6 + 2 + 614 + 2 + 2 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 611671824 + 14470416 = 24732^2 + 3804^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (626142241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215971 + ... + 218850.

Almost surely, 2^626142240 is an apocalyptic number.

626142240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

626142240 is an abundant number, since it is smaller than the sum of its proper divisors (1510573068).

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

626142240 is a wasteful number, since it uses less digits than its factorization.

626142240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434842 (or 434831 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 626142240 is about 25022.8343718293. The cubic root of 626142240 is about 855.5085104720.

Adding to 626142240 its reverse (42241626), we get a palindrome (668383866).

The spelling of 626142240 in words is "six hundred twenty-six million, one hundred forty-two thousand, two hundred forty".