40428257760 has 384 divisors, whose sum is σ = 162490406400. Its totient is φ = 9284751360.

The previous prime is 40428257717. The next prime is 40428257767. The reversal of 40428257760 is 6775282404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40428257767) 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, 880492 + ... + 925268.

It is an arithmetic number, because the mean of its divisors is an integer number (423152100).

Almost surely, 2^40428257760 is an apocalyptic number.

40428257760 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40428257760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81245203200).

40428257760 is an abundant number, since it is smaller than the sum of its proper divisors (122062148640).

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

40428257760 is a wasteful number, since it uses less digits than its factorization.

40428257760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44831 (or 44817 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 40428257760 in words is "forty billion, four hundred twenty-eight million, two hundred fifty-seven thousand, seven hundred sixty".