40289280 has 176 divisors, whose sum is σ = 134021184. Its totient is φ = 10321920.

The previous prime is 40289267. The next prime is 40289297. The reversal of 40289280 is 8298204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660450 + ... + 660510.

It is an arithmetic number, because the mean of its divisors is an integer number (761484).

Almost surely, 2^40289280 is an apocalyptic number.

40289280 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 40289280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67010592).

40289280 is an abundant number, since it is smaller than the sum of its proper divisors (93731904).

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

40289280 is a wasteful number, since it uses less digits than its factorization.

40289280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 40289280 is about 6347.3837129955. The cubic root of 40289280 is about 342.8176462439.

The spelling of 40289280 in words is "forty million, two hundred eighty-nine thousand, two hundred eighty".