70821404 has 12 divisors (see below), whose sum is σ = 127287384. Its totient is φ = 34453584.

The previous prime is 70821403. The next prime is 70821419. The reversal of 70821404 is 40412807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70821403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239114 + ... + 239409.

It is an arithmetic number, because the mean of its divisors is an integer number (10607282).

Almost surely, 2^70821404 is an apocalyptic number.

70821404 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

70821404 is a deficient number, since it is larger than the sum of its proper divisors (56465980).

70821404 is a wasteful number, since it uses less digits than its factorization.

70821404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478564 (or 478562 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 70821404 is about 8415.5453774547. The cubic root of 70821404 is about 413.7342845958.

The spelling of 70821404 in words is "seventy million, eight hundred twenty-one thousand, four hundred four".