1249401772828 has 48 divisors (see below), whose sum is σ = 2419082426880. Its totient is φ = 559849550400.

The previous prime is 1249401772823. The next prime is 1249401772831. The reversal of 1249401772828 is 8282771049421.

It is a super-2 number, since 2×1249401772828² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249401772823) 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, 40043458 + ... + 40074646.

It is an arithmetic number, because the mean of its divisors is an integer number (50397550560).

Almost surely, 2^{1249401772828} is an apocalyptic number.

It is an amenable number.

1249401772828 is a deficient number, since it is larger than the sum of its proper divisors (1169680654052).

1249401772828 is a wasteful number, since it uses less digits than its factorization.

1249401772828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44098 (or 44096 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 1249401772828 in words is "one trillion, two hundred forty-nine billion, four hundred one million, seven hundred seventy-two thousand, eight hundred twenty-eight".