1061620736 has 66 divisors (see below), whose sum is σ = 2322698148. Its totient is φ = 480983040.

The previous prime is 1061620717. The next prime is 1061620741. The reversal of 1061620736 is 6370261601.

It is a super-2 number, since 2×1061620736² = 2254077174210363392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3457895 + ... + 3458201.

Almost surely, 2^1061620736 is an apocalyptic number.

1061620736 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 1061620736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161349074).

1061620736 is an abundant number, since it is smaller than the sum of its proper divisors (1261077412).

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

1061620736 is an frugal number, since it uses more digits than its factorization.

1061620736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1061620736 is about 32582.5219404514. The cubic root of 1061620736 is about 1020.1322191795.

The spelling of 1061620736 in words is "one billion, sixty-one million, six hundred twenty thousand, seven hundred thirty-six".