405241040 has 40 divisors (see below), whose sum is σ = 943252128. Its totient is φ = 161912960.

The previous prime is 405241009. The next prime is 405241043. The reversal of 405241040 is 40142504.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405241043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84959 + ... + 89601.

Almost surely, 2^405241040 is an apocalyptic number.

405241040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405241040 is an abundant number, since it is smaller than the sum of its proper divisors (538011088).

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

405241040 is a wasteful number, since it uses less digits than its factorization.

405241040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747 (or 5741 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 405241040 is about 20130.5995936534. The cubic root of 405241040 is about 740.0103723893.

Adding to 405241040 its reverse (40142504), we get a palindrome (445383544).

The spelling of 405241040 in words is "four hundred five million, two hundred forty-one thousand, forty".