3728809477 has 4 divisors (see below), whose sum is σ = 3729313696. Its totient is φ = 3728305260.

The previous prime is 3728809439. The next prime is 3728809517. The reversal of 3728809477 is 7749088273.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7749088273 = 41 ⋅189002153.

It is a cyclic number.

It is not a de Polignac number, because 3728809477 - 2⁷ = 3728809349 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 (3728800477) 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, 240849 + ... + 255862.

It is an arithmetic number, because the mean of its divisors is an integer number (932328424).

Almost surely, 2^3728809477 is an apocalyptic number.

It is an amenable number.

3728809477 is a deficient number, since it is larger than the sum of its proper divisors (504219).

3728809477 is an equidigital number, since it uses as much as digits as its factorization.

3728809477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504218.

The product of its (nonzero) digits is 4741632, while the sum is 55.

The square root of 3728809477 is about 61063.9785552825. The cubic root of 3728809477 is about 1550.6843286934.

The spelling of 3728809477 in words is "three billion, seven hundred twenty-eight million, eight hundred nine thousand, four hundred seventy-seven".