1240649088 has 128 divisors (see below), whose sum is σ = 3778928640. Its totient is φ = 353280000.

The previous prime is 1240649071. The next prime is 1240649119. The reversal of 1240649088 is 8809460421.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1077313 + ... + 1078463.

It is an arithmetic number, because the mean of its divisors is an integer number (29522880).

Almost surely, 2^1240649088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240649088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889464320).

1240649088 is an abundant number, since it is smaller than the sum of its proper divisors (2538279552).

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

1240649088 is a wasteful number, since it uses less digits than its factorization.

1240649088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576 (or 1564 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 1240649088 is about 35222.8489478066. The cubic root of 1240649088 is about 1074.5244950912.

The spelling of 1240649088 in words is "one billion, two hundred forty million, six hundred forty-nine thousand, eighty-eight".