40351749 has 8 divisors (see below), whose sum is σ = 55114752. Its totient is φ = 26244960.

The previous prime is 40351723. The next prime is 40351771. The reversal of 40351749 is 94715304.

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

It is not a de Polignac number, because 40351749 - 2⁹ = 40351237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40351249) 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, 163909 + ... + 164154.

It is an arithmetic number, because the mean of its divisors is an integer number (6889344).

Almost surely, 2^40351749 is an apocalyptic number.

It is an amenable number.

40351749 is a deficient number, since it is larger than the sum of its proper divisors (14763003).

40351749 is a wasteful number, since it uses less digits than its factorization.

40351749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328107.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 40351749 is about 6352.3026533691. The cubic root of 40351749 is about 342.9947356727.

The spelling of 40351749 in words is "forty million, three hundred fifty-one thousand, seven hundred forty-nine".