401037780 has 192 divisors, whose sum is σ = 1351139328. Its totient is φ = 87575040.

The previous prime is 401037779. The next prime is 401037787. The reversal of 401037780 is 87730104.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401037787) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 368397 + ... + 369483.

It is an arithmetic number, because the mean of its divisors is an integer number (7037184).

Almost surely, 2^401037780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401037780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (675569664).

401037780 is an abundant number, since it is smaller than the sum of its proper divisors (950101548).

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

401037780 is a wasteful number, since it uses less digits than its factorization.

401037780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 401037780 is about 20025.9276938673. The cubic root of 401037780 is about 737.4429518259.

Adding to 401037780 its reverse (87730104), we get a palindrome (488767884).

The spelling of 401037780 in words is "four hundred one million, thirty-seven thousand, seven hundred eighty".