617121240 has 32 divisors (see below), whose sum is σ = 1851364080. Its totient is φ = 164565632.

The previous prime is 617121203. The next prime is 617121287. The reversal of 617121240 is 42121716.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 617121240.

It is a congruent number.

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, 2571219 + ... + 2571458.

Almost surely, 2^617121240 is an apocalyptic number.

617121240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

617121240 is an abundant number, since it is smaller than the sum of its proper divisors (1234242840).

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

617121240 is a wasteful number, since it uses less digits than its factorization.

617121240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5142691 (or 5142687 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 617121240 is about 24841.9250461795. The cubic root of 617121240 is about 851.3801062990.

Adding to 617121240 its reverse (42121716), we get a palindrome (659242956).

The spelling of 617121240 in words is "six hundred seventeen million, one hundred twenty-one thousand, two hundred forty".