1072228729 has 16 divisors (see below), whose sum is σ = 1325983680. Its totient is φ = 852413760.

The previous prime is 1072228699. The next prime is 1072228741. The reversal of 1072228729 is 9278222701.

It is not a de Polignac number, because 1072228729 - 2⁷ = 1072228601 is a prime.

It is a super-2 number, since 2×1072228729² = 2299348894585910882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1072228691 and 1072228700.

It is not an unprimeable number, because it can be changed into a prime (1072228769) 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, 194602 + ... + 200035.

It is an arithmetic number, because the mean of its divisors is an integer number (82873980).

Almost surely, 2^1072228729 is an apocalyptic number.

1072228729 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1072228729 is a deficient number, since it is larger than the sum of its proper divisors (253754951).

1072228729 is a wasteful number, since it uses less digits than its factorization.

1072228729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394680.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 1072228729 is about 32744.9038630441. The cubic root of 1072228729 is about 1023.5187739379.

The spelling of 1072228729 in words is "one billion, seventy-two million, two hundred twenty-eight thousand, seven hundred twenty-nine".