1249399416 has 64 divisors (see below), whose sum is σ = 3317126400. Its totient is φ = 391039488.

The previous prime is 1249399351. The next prime is 1249399423. The reversal of 1249399416 is 6149939421.

It is a happy number.

It is a super-3 number, since 3×1249399416³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 39405 + ... + 63651.

It is an arithmetic number, because the mean of its divisors is an integer number (51830100).

Almost surely, 2^1249399416 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 1249399416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658563200).

1249399416 is an abundant number, since it is smaller than the sum of its proper divisors (2067726984).

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

1249399416 is a wasteful number, since it uses less digits than its factorization.

1249399416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24388 (or 24384 counting only the distinct ones).

The product of its digits is 419904, while the sum is 48.

The square root of 1249399416 is about 35346.8444984839. The cubic root of 1249399416 is about 1077.0447948442.

The spelling of 1249399416 in words is "one billion, two hundred forty-nine million, three hundred ninety-nine thousand, four hundred sixteen".