1401772028 has 12 divisors (see below), whose sum is σ = 2487652272. Its totient is φ = 691014240.

The previous prime is 1401772019. The next prime is 1401772051. The reversal of 1401772028 is 8202771041.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1401771985 and 1401772003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2467625 + ... + 2468192.

It is an arithmetic number, because the mean of its divisors is an integer number (207304356).

Almost surely, 2^1401772028 is an apocalyptic number.

It is an amenable number.

1401772028 is a deficient number, since it is larger than the sum of its proper divisors (1085880244).

1401772028 is a wasteful number, since it uses less digits than its factorization.

1401772028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4935892 (or 4935890 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 1401772028 is about 37440.2460996185. The cubic root of 1401772028 is about 1119.1607307340.

The spelling of 1401772028 in words is "one billion, four hundred one million, seven hundred seventy-two thousand, twenty-eight".