1071621936 has 240 divisors, whose sum is σ = 3773472768. Its totient is φ = 275788800.

The previous prime is 1071621931. The next prime is 1071621937. The reversal of 1071621936 is 6391261701.

It is a super-2 number, since 2×1071621936² = 2296747147432776192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1071621936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071621931) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1407796 + ... + 1408556.

Almost surely, 2^1071621936 is an apocalyptic number.

1071621936 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 1071621936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1886736384).

1071621936 is an abundant number, since it is smaller than the sum of its proper divisors (2701850832).

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

1071621936 is a wasteful number, since it uses less digits than its factorization.

1071621936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 911 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1071621936 is about 32735.6370947626. The cubic root of 1071621936 is about 1023.3256617768.

The spelling of 1071621936 in words is "one billion, seventy-one million, six hundred twenty-one thousand, nine hundred thirty-six".