403040645 has 16 divisors (see below), whose sum is σ = 557912448. Its totient is φ = 273785280.

The previous prime is 403040629. The next prime is 403040663. The reversal of 403040645 is 546040304.

It is not a de Polignac number, because 403040645 - 2⁴ = 403040629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50066 + ... + 57555.

It is an arithmetic number, because the mean of its divisors is an integer number (34869528).

Almost surely, 2^403040645 is an apocalyptic number.

It is an amenable number.

403040645 is a deficient number, since it is larger than the sum of its proper divisors (154871803).

403040645 is a wasteful number, since it uses less digits than its factorization.

403040645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107740.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 403040645 is about 20075.8722101930. The cubic root of 403040645 is about 738.6685609324.

Adding to 403040645 its reverse (546040304), we get a palindrome (949080949).

The spelling of 403040645 in words is "four hundred three million, forty thousand, six hundred forty-five".