40353440 has 24 divisors (see below), whose sum is σ = 95335380. Its totient is φ = 16141312.

The previous prime is 40353433. The next prime is 40353449. The reversal of 40353440 is 4435304.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38291344 + 2062096 = 6188^2 + 1436^2 .

It is not an unprimeable number, because it can be changed into a prime (40353449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125945 + ... + 126264.

Almost surely, 2^40353440 is an apocalyptic number.

40353440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40353440 is an abundant number, since it is smaller than the sum of its proper divisors (54981940).

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

40353440 is a wasteful number, since it uses less digits than its factorization.

40353440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252224 (or 252216 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 40353440 is about 6352.4357533154. The cubic root of 40353440 is about 342.9995268405. Note that the first 3 decimals are identical.

Adding to 40353440 its reverse (4435304), we get a palindrome (44788744).

It can be divided in two parts, 40 and 353440, that multiplied together give a square (14137600 = 3760²).

The spelling of 40353440 in words is "forty million, three hundred fifty-three thousand, four hundred forty".