401235780 has 48 divisors (see below), whose sum is σ = 1225594944. Its totient is φ = 97269120.

The previous prime is 401235761. The next prime is 401235797. The reversal of 401235780 is 87532104.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303307 + ... + 304626.

It is an arithmetic number, because the mean of its divisors is an integer number (25533228).

Almost surely, 2^401235780 is an apocalyptic number.

It is an amenable number.

401235780 is an abundant number, since it is smaller than the sum of its proper divisors (824359164).

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

401235780 is a wasteful number, since it uses less digits than its factorization.

401235780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607956 (or 607954 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 401235780 is about 20030.8706750356. The cubic root of 401235780 is about 737.5642950745.

Adding to 401235780 its reverse (87532104), we get a palindrome (488767884).

The spelling of 401235780 in words is "four hundred one million, two hundred thirty-five thousand, seven hundred eighty".