1051606728 has 24 divisors (see below), whose sum is σ = 2848101750. Its totient is φ = 350535552.

The previous prime is 1051606727. The next prime is 1051606771. The reversal of 1051606728 is 8276061501.

It can be written as a sum of positive squares in only one way, i.e., 637158564 + 414448164 = 25242^2 + 20358^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1051606728² = 2211753420749731968, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1051606692 and 1051606701.

It is not an unprimeable number, because it can be changed into a prime (1051606727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7302753 + ... + 7302896.

Almost surely, 2^1051606728 is an apocalyptic number.

1051606728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1051606728 is an abundant number, since it is smaller than the sum of its proper divisors (1796495022).

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

1051606728 is a wasteful number, since it uses less digits than its factorization.

1051606728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14605661 (or 14605654 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1051606728 is about 32428.4863661565. The cubic root of 1051606728 is about 1016.9145283094.

The spelling of 1051606728 in words is "one billion, fifty-one million, six hundred six thousand, seven hundred twenty-eight".