1401520428 has 96 divisors (see below), whose sum is σ = 4530193920. Its totient is φ = 364029120.

The previous prime is 1401520411. The next prime is 1401520451. The reversal of 1401520428 is 8240251041.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75951 + ... + 92582.

It is an arithmetic number, because the mean of its divisors is an integer number (47189520).

Almost surely, 2^1401520428 is an apocalyptic number.

1401520428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1401520428 is an abundant number, since it is smaller than the sum of its proper divisors (3128673492).

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

1401520428 is a wasteful number, since it uses less digits than its factorization.

1401520428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168564 (or 168556 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 1401520428 is about 37436.8859281859. The cubic root of 1401520428 is about 1119.0937684219.

Adding to 1401520428 its reverse (8240251041), we get a palindrome (9641771469).

It can be divided in two parts, 14015 and 20428, that added together give a palindrome (34443).

The spelling of 1401520428 in words is "one billion, four hundred one million, five hundred twenty thousand, four hundred twenty-eight".