1921226496 has 216 divisors, whose sum is σ = 6263470080. Its totient is φ = 519837696.

The previous prime is 1921226449. The next prime is 1921226513. The reversal of 1921226496 is 6946221291.

It is a super-2 number, since 2×1921226496² = 7382222497864876032, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 713665 + ... + 716351.

Almost surely, 2^1921226496 is an apocalyptic number.

1921226496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1921226496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3131735040).

1921226496 is an abundant number, since it is smaller than the sum of its proper divisors (4342243584).

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

1921226496 is a wasteful number, since it uses less digits than its factorization.

1921226496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739 (or 2718 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 1921226496 is about 43831.7977728498. The cubic root of 1921226496 is about 1243.1575993980.

The spelling of 1921226496 in words is "one billion, nine hundred twenty-one million, two hundred twenty-six thousand, four hundred ninety-six".