7213736 has 8 divisors (see below), whose sum is σ = 13525770. Its totient is φ = 3606864.

The previous prime is 7213709. The next prime is 7213747. The reversal of 7213736 is 6373127.

It can be written as a sum of positive squares in only one way, i.e., 6791236 + 422500 = 2606^2 + 650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 7213699 and 7213708.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450851 + ... + 450866.

Almost surely, 2^7213736 is an apocalyptic number.

It is an amenable number.

7213736 is a deficient number, since it is larger than the sum of its proper divisors (6312034).

7213736 is a wasteful number, since it uses less digits than its factorization.

7213736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901723 (or 901719 counting only the distinct ones).

The product of its digits is 5292, while the sum is 29.

The square root of 7213736 is about 2685.8399058767. The cubic root of 7213736 is about 193.2205948608.

The spelling of 7213736 in words is "seven million, two hundred thirteen thousand, seven hundred thirty-six".