40720084 has 6 divisors (see below), whose sum is σ = 71260154. Its totient is φ = 20360040.

The previous prime is 40720079. The next prime is 40720087. The reversal of 40720084 is 48002704.

It can be written as a sum of positive squares in only one way, i.e., 38787984 + 1932100 = 6228^2 + 1390^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40720087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5090007 + ... + 5090014.

Almost surely, 2^40720084 is an apocalyptic number.

It is an amenable number.

40720084 is a deficient number, since it is larger than the sum of its proper divisors (30540070).

40720084 is a wasteful number, since it uses less digits than its factorization.

40720084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10180025 (or 10180023 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 40720084 is about 6381.2290352251. The cubic root of 40720084 is about 344.0352068707.

Adding to 40720084 its reverse (48002704), we get a palindrome (88722788).

The spelling of 40720084 in words is "forty million, seven hundred twenty thousand, eighty-four".