40030057 has 8 divisors (see below), whose sum is σ = 40581800. Its totient is φ = 39481344.

The previous prime is 40030043. The next prime is 40030069. The reversal of 40030057 is 75003004.

It can be written as a sum of positive squares in 4 ways, for example, as 9603801 + 30426256 = 3099^2 + 5516^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40030057 - 2¹⁵ = 39997289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40030027) 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, 39169 + ... + 40177.

It is an arithmetic number, because the mean of its divisors is an integer number (5072725).

Almost surely, 2^40030057 is an apocalyptic number.

It is an amenable number.

40030057 is a deficient number, since it is larger than the sum of its proper divisors (551743).

40030057 is a wasteful number, since it uses less digits than its factorization.

40030057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 40030057 is about 6326.9310886084. The cubic root of 40030057 is about 342.0808291333.

The spelling of 40030057 in words is "forty million, thirty thousand, fifty-seven".