40780421 has 8 divisors (see below), whose sum is σ = 45152544. Its totient is φ = 36519120.

The previous prime is 40780417. The next prime is 40780429. The reversal of 40780421 is 12408704.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40780421 - 2² = 40780417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40780429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26930 + ... + 28403.

It is an arithmetic number, because the mean of its divisors is an integer number (5644068).

Almost surely, 2^40780421 is an apocalyptic number.

It is an amenable number.

40780421 is a deficient number, since it is larger than the sum of its proper divisors (4372123).

40780421 is a wasteful number, since it uses less digits than its factorization.

40780421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55411.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 40780421 is about 6385.9549794843. The cubic root of 40780421 is about 344.2050477774.

The spelling of 40780421 in words is "forty million, seven hundred eighty thousand, four hundred twenty-one".