40780000 has 60 divisors (see below), whose sum is σ = 100374120. Its totient is φ = 16304000.

The previous prime is 40779967. The next prime is 40780001. The reversal of 40780000 is 8704.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40780000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40780001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18981 + ... + 21019.

It is an arithmetic number, because the mean of its divisors is an integer number (1672902).

Almost surely, 2^40780000 is an apocalyptic number.

40780000 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 40780000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50187060).

40780000 is an abundant number, since it is smaller than the sum of its proper divisors (59594120).

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

40780000 is an equidigital number, since it uses as much as digits as its factorization.

40780000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069 (or 2046 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 40780000 is about 6385.9220164358. The cubic root of 40780000 is about 344.2038632970.

Adding to 40780000 its reverse (8704), we get a palindrome (40788704).

The spelling of 40780000 in words is "forty million, seven hundred eighty thousand".