1401555528 has 32 divisors (see below), whose sum is σ = 3893210400. Its totient is φ = 467185104.

The previous prime is 1401555527. The next prime is 1401555559. The reversal of 1401555528 is 8255551041.

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 = 1401555492 and 1401555501.

It is not an unprimeable number, because it can be changed into a prime (1401555527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3244126 + ... + 3244557.

It is an arithmetic number, because the mean of its divisors is an integer number (121662825).

Almost surely, 2^1401555528 is an apocalyptic number.

1401555528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1401555528 is an abundant number, since it is smaller than the sum of its proper divisors (2491654872).

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

1401555528 is a wasteful number, since it uses less digits than its factorization.

1401555528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6488698 (or 6488688 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The square root of 1401555528 is about 37437.3547142423. The cubic root of 1401555528 is about 1119.1031106245.

The spelling of 1401555528 in words is "one billion, four hundred one million, five hundred fifty-five thousand, five hundred twenty-eight".