400248102780 has 144 divisors (see below), whose sum is σ = 1279155870720. Its totient is φ = 101022685056.

The previous prime is 400248102773. The next prime is 400248102853. The reversal of 400248102780 is 87201842004.

400248102780 is a `hidden beast` number, since 400 + 248 + 1 + 0 + 2 + 7 + 8 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3719209 + ... + 3825311.

It is an arithmetic number, because the mean of its divisors is an integer number (8883026880).

Almost surely, 2^400248102780 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 400248102780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (639577935360).

400248102780 is an abundant number, since it is smaller than the sum of its proper divisors (878907767940).

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

400248102780 is a wasteful number, since it uses less digits than its factorization.

400248102780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107240 (or 107235 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

Adding to 400248102780 its reverse (87201842004), we get a palindrome (487449944784).

The spelling of 400248102780 in words is "four hundred billion, two hundred forty-eight million, one hundred two thousand, seven hundred eighty".