40705280 has 216 divisors, whose sum is σ = 125828640. Its totient is φ = 12472320.

The previous prime is 40705229. The next prime is 40705283. The reversal of 40705280 is 8250704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40705283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 689891 + ... + 689949.

It is an arithmetic number, because the mean of its divisors is an integer number (582540).

Almost surely, 2^40705280 is an apocalyptic number.

40705280 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 40705280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62914320).

40705280 is an abundant number, since it is smaller than the sum of its proper divisors (85123360).

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

40705280 is a wasteful number, since it uses less digits than its factorization.

40705280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 40705280 is about 6380.0689651445. The cubic root of 40705280 is about 343.9935098830.

Adding to 40705280 its reverse (8250704), we get a palindrome (48955984).

The spelling of 40705280 in words is "forty million, seven hundred five thousand, two hundred eighty".