40247280 has 100 divisors (see below), whose sum is σ = 139807272. Its totient is φ = 10730880.

The previous prime is 40247267. The next prime is 40247287. The reversal of 40247280 is 8274204.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40247287) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3375 + ... + 9585.

Almost surely, 2^40247280 is an apocalyptic number.

40247280 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 40247280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69903636).

40247280 is an abundant number, since it is smaller than the sum of its proper divisors (99559992).

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

40247280 is a wasteful number, since it uses less digits than its factorization.

40247280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6236 (or 6221 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 40247280 is about 6344.0744005726. The cubic root of 40247280 is about 342.6984801590.

The spelling of 40247280 in words is "forty million, two hundred forty-seven thousand, two hundred eighty".