610440240 has 80 divisors (see below), whose sum is σ = 1974659328. Its totient is φ = 155705088.

The previous prime is 610440239. The next prime is 610440241. The reversal of 610440240 is 42044016.

It is an interprime number because it is at equal distance from previous prime (610440239) and next prime (610440241).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×610440240² = 745274573222515200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (610440241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49774 + ... + 60813.

Almost surely, 2^610440240 is an apocalyptic number.

610440240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

610440240 is an abundant number, since it is smaller than the sum of its proper divisors (1364219088).

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

610440240 is a wasteful number, since it uses less digits than its factorization.

610440240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110626 (or 110620 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 610440240 is about 24707.0888612965. The cubic root of 610440240 is about 848.2965839890.

Adding to 610440240 its reverse (42044016), we get a palindrome (652484256).

The spelling of 610440240 in words is "six hundred ten million, four hundred forty thousand, two hundred forty".