1493681404 has 24 divisors (see below), whose sum is σ = 2819931408. Its totient is φ = 689644800.

The previous prime is 1493681389. The next prime is 1493681437. The reversal of 1493681404 is 4041863941.

It is a super-2 number, since 2×1493681404² = 4462168273310822432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203622 + ... + 210829.

It is an arithmetic number, because the mean of its divisors is an integer number (117497142).

Almost surely, 2^1493681404 is an apocalyptic number.

It is an amenable number.

1493681404 is a deficient number, since it is larger than the sum of its proper divisors (1326250004).

1493681404 is a wasteful number, since it uses less digits than its factorization.

1493681404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414525 (or 414523 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1493681404 is about 38648.1746528863. The cubic root of 1493681404 is about 1143.1046499444.

The spelling of 1493681404 in words is "one billion, four hundred ninety-three million, six hundred eighty-one thousand, four hundred four".